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How do you set a default value for a MySQL Datetime column?
In SQL Server it's getdate(). What is the equivalant for MySQL? I'm using MySQL 5.x if that is a factor.
IMPORTANT EDIT:
It is now possible to achieve this with DATETIME fields since MySQL 5.6.5, take a look at the other post below...
Previous versions can't do that with DATETIME...
But you can do it with TIMESTAMP:
mysql> create table test (str varchar(32), ts TIMESTAMP DEFAULT CURRENT_TIMESTAMP);
Query OK, 0 rows affected (0.00 sec)
mysql> desc test;
+-------+-------------+------+-----+-------------------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+-------------------+-------+
| str | varchar(32) | YES | | NULL | |
| ts | timestamp | NO | | CURRENT_TIMESTAMP | |
+-------+-------------+------+-----+-------------------+-------+
2 rows in set (0.00 sec)
mysql> insert into test (str) values ("demo");
Query OK, 1 row affected (0.00 sec)
mysql> select * from test;
+------+---------------------+
| str | ts |
+------+---------------------+
| demo | 2008-10-03 22:59:52 |
+------+---------------------+
1 row in set (0.00 sec)
mysql>
CAVEAT: IF you define a column with CURRENT_TIMESTAMP ON as default, you will need to ALWAYS specify a value for this column or the value will automatically reset itself to "now()" on update. This means that if you do not want the value to change, your UPDATE statement must contain "[your column name] = [your column name]" (or some other value) or the value will become "now()". Weird, but true. I am using 5.5.56-MariaDB
In version 5.6.5, it is possible to set a default value on a datetime column, and even make a column that will update when the row is updated. The type definition:
CREATE TABLE foo (
`creation_time` DATETIME DEFAULT CURRENT_TIMESTAMP,
`modification_time` DATETIME ON UPDATE CURRENT_TIMESTAMP
)
Reference:
http://optimize-this.blogspot.com/2012/04/datetime-default-now-finally-available.html
MySQL (before version 5.6.5) does not allow functions to be used for default DateTime values. TIMESTAMP is not suitable due to its odd behavior and is not recommended for use as input data. (See MySQL Data Type Defaults.)
That said, you can accomplish this by creating a Trigger.
I have a table with a DateCreated field of type DateTime. I created a trigger on that table "Before Insert" and "SET NEW.DateCreated=NOW()" and it works great.
For me the trigger approach has worked the best, but I found a snag with the approach. Consider the basic trigger to set a date field to the current time on insert:
CREATE TRIGGER myTable_OnInsert BEFORE INSERT ON `tblMyTable`
FOR EACH ROW SET NEW.dateAdded = NOW();
This is usually great, but say you want to set the field manually via INSERT statement, like so:
INSERT INTO tblMyTable(name, dateAdded) VALUES('Alice', '2010-01-03 04:30:43');
What happens is that the trigger immediately overwrites your provided value for the field, and so the only way to set a non-current time is a follow up UPDATE statement--yuck! To override this behavior when a value is provided, try this slightly modified trigger with the IFNULL operator:
CREATE TRIGGER myTable_OnInsert BEFORE INSERT ON `tblMyTable`
FOR EACH ROW SET NEW.dateAdded = IFNULL(NEW.dateAdded, NOW());
This gives the best of both worlds: you can provide a value for your date column and it will take, and otherwise it'll default to the current time. It's still ghetto relative to something clean like DEFAULT GETDATE() in the table definition, but we're getting closer!
I was able to solve this using this alter statement on my table that had two datetime fields.
ALTER TABLE `test_table`
CHANGE COLUMN `created_dt` `created_dt` TIMESTAMP NOT NULL DEFAULT '0000-00-00 00:00:00',
CHANGE COLUMN `updated_dt` `updated_dt` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP;
This works as you would expect the now() function to work. Inserting nulls or ignoring the created_dt and updated_dt fields results in a perfect timestamp value in both fields. Any update to the row changes the updated_dt. If you insert records via the MySQL query browser you needed one more step, a trigger to handle the created_dt with a new timestamp.
CREATE TRIGGER trig_test_table_insert BEFORE INSERT ON `test_table`
FOR EACH ROW SET NEW.created_dt = NOW();
The trigger can be whatever you want I just like the naming convention [trig]_[my_table_name]_[insert]
You can use triggers to do this type of stuff.
CREATE TABLE `MyTable` (
`MyTable_ID` int UNSIGNED NOT NULL AUTO_INCREMENT ,
`MyData` varchar(10) NOT NULL ,
`CreationDate` datetime NULL ,
`UpdateDate` datetime NULL ,
PRIMARY KEY (`MyTable_ID`)
)
;
CREATE TRIGGER `MyTable_INSERT` BEFORE INSERT ON `MyTable`
FOR EACH ROW BEGIN
-- Set the creation date
SET new.CreationDate = now();
-- Set the udpate date
Set new.UpdateDate = now();
END;
CREATE TRIGGER `MyTable_UPDATE` BEFORE UPDATE ON `MyTable`
FOR EACH ROW BEGIN
-- Set the udpate date
Set new.UpdateDate = now();
END;
For all those who lost heart trying to set a default DATETIME value in MySQL, I know exactly how you feel/felt. So here is is:
ALTER TABLE `table_name` CHANGE `column_name` DATETIME NOT NULL DEFAULT 0
Carefully observe that I haven't added single quotes/double quotes around the 0
I'm literally jumping after solving this one :D
If you have already created the table then you can use
To change default value to current date time
ALTER TABLE <TABLE_NAME>
CHANGE COLUMN <COLUMN_NAME> <COLUMN_NAME> DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP;
To change default value to '2015-05-11 13:01:01'
ALTER TABLE <TABLE_NAME>
CHANGE COLUMN <COLUMN_NAME> <COLUMN_NAME> DATETIME NOT NULL DEFAULT '2015-05-11 13:01:01';
MySQL 5.6 has fixed this problem.
ALTER TABLE mytable CHANGE mydate datetime NOT NULL DEFAULT 'CURRENT_TIMESTAMP'
this is indeed terrible news.here is a long pending bug/feature request for this. that discussion also talks about the limitations of timestamp data type.
I am seriously wondering what is the issue with getting this thing implemented.
You can use now() to set the value of a datetime column, but keep in mind that you can't use that as a default value.
I'm running MySql Server 5.7.11 and this sentence:
ALTER TABLE table_name CHANGE date_column datetime NOT NULL DEFAULT '0000-00-00 00:00:00'
is not working. But the following:
ALTER TABLE table_name CHANGE date_column datetime NOT NULL DEFAULT '1000-01-01 00:00:00'
just works.
As a sidenote, it is mentioned in the mysql docs:
The DATE type is used for values with a date part but no time part. MySQL retrieves and displays DATE values in 'YYYY-MM-DD' format. The supported range is '1000-01-01' to '9999-12-31'.
even if they also say:
Invalid DATE, DATETIME, or TIMESTAMP values are converted to the “zero” value of the appropriate type ('0000-00-00' or '0000-00-00 00:00:00').
For all who use the TIMESTAMP column as a solution i want to second the following limitation from the manual:
http://dev.mysql.com/doc/refman/5.0/en/datetime.html
"The TIMESTAMP data type has a range of '1970-01-01 00:00:01' UTC to '2038-01-19 03:14:07' UTC. It has varying properties, depending on the MySQL version and the SQL mode the server is running in. These properties are described later in this section. "
So this will obviously break your software in about 28 years.
I believe the only solution on the database side is to use triggers like mentioned in other answers.
While defining multi-line triggers one has to change the delimiter as semicolon will be taken by MySQL compiler as end of trigger and generate error.
e.g.
DELIMITER //
CREATE TRIGGER `MyTable_UPDATE` BEFORE UPDATE ON `MyTable`
FOR EACH ROW BEGIN
-- Set the udpate date
Set new.UpdateDate = now();
END//
DELIMITER ;
Working fine with MySQL 8.x
CREATE TABLE `users` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`dateCreated` datetime DEFAULT CURRENT_TIMESTAMP,
`dateUpdated` datetime DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
PRIMARY KEY (`id`),
UNIQUE KEY `mobile_UNIQUE` (`mobile`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
Here is how to do it on MySQL 5.1:
ALTER TABLE `table_name` CHANGE `column_name` `column_name`
TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP;
I have no clue why you have to enter the column name twice.
While you can't do this with DATETIME in the default definition, you can simply incorporate a select statement in your insert statement like this:
INSERT INTO Yourtable (Field1, YourDateField) VALUES('val1', (select now()))
Note the lack of quotes around the table.
For MySQL 5.5
If you are trying to set default value as NOW(), I don't think MySQL supports that. In MySQL, you cannot use a function or an expression as the default value for any type of column, except for the TIMESTAMP data type column, for which you can specify the CURRENT_TIMESTAMP as the default.
I think it simple in mysql since mysql the inbuilt function called now() which gives current time(time of that insert).
So your query should look like similarly
CREATE TABLE defaultforTime(
`creation_time` DATETIME DEFAULT CURRENT_TIMESTAMP,
`modification_time` DATETIME default now()
);
Thank you.
If you set ON UPDATE CURRENT_TIMESTAMP it will take current time when row data update in table.
CREATE TABLE bar(
`create_time` TIMESTAMP CURRENT_TIMESTAMP,
`update_time` TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
)
CREATE TABLE `testtable` (
`id` INT(10) NULL DEFAULT NULL,
`colname` DATETIME NULL DEFAULT '1999-12-12 12:12:12'
)
In the above query to create 'testtable', i used '1999-12-12 12:12:12' as default value for DATETIME column colname
Use the following code
DELIMITER $$
CREATE TRIGGER bu_table1_each BEFORE UPDATE ON table1 FOR EACH ROW
BEGIN
SET new.datefield = NOW();
END $$
DELIMITER ;
If you are trying to set default value as NOW(),MySQL supports that you have to change the type of that column TIMESTAMP instead of DATETIME. TIMESTAMP have current date and time as default..i think it will resolved your problem..
Take for instance If I had a table named 'site' with a created_at and an update_at column that were both DATETIME and need the default value of now, I could execute the following sql to achieve this.
ALTER TABLE `site` CHANGE `created_at` `created_at` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP;
ALTER TABLE `site` CHANGE `created_at` `created_at` DATETIME NULL DEFAULT NULL;
ALTER TABLE `site` CHANGE `updated_at` `updated_at` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP;
ALTER TABLE `site` CHANGE `updated_at` `updated_at` DATETIME NULL DEFAULT NULL;
The sequence of statements is important because a table can not have two columns of type TIMESTAMP with default values of CUREENT TIMESTAMP
This is my trigger example:
/************ ROLE ************/
drop table if exists `role`;
create table `role` (
`id_role` bigint(20) unsigned not null auto_increment,
`date_created` datetime,
`date_deleted` datetime,
`name` varchar(35) not null,
`description` text,
primary key (`id_role`)
) comment='';
drop trigger if exists `role_date_created`;
create trigger `role_date_created` before insert
on `role`
for each row
set new.`date_created` = now();
You can resolve the default timestamp. First consider which character set you are using for example if u taken utf8 this character set support all languages and if u taken laten1 this character set support only for English. Next setp if you are working under any project you should know client time zone and select you are client zone. This step are mandatory.
I am trying to create a trigger with a higher difficulty that would let me create a log after updating rows in alumns table
| Alumn_ID | Name | Courses | Favourite_Course
1 Peter 5 Math
And this would be the result if for example someone updated the number of courses from 5 to 6.
| Log_ID | Alumn_ID | Note | NoteID | Change_Date | Last_Change_Date
1 1 Fields were Updated Note 1 2018-04-23 00:00:00.000 2018-03-23 00:00:00.000
Here is my current trigger
ALTER TRIGGER [LOG]
ON ALUMNS
AFTER UPDATE
AS
BEGIN
DECLARE #Note VARCHAR(50)
DECLARE #Alumn_ID varchar;
SELECT #Alumn_ID= INSERTED.Alumn_ID FROM INSERTED
SET #Note = 'Fields were updated'
INSERT INTO Alumn_Log (Log_ID, Alumn_ID, Note, NoteID, Change_Date)
SELECT Log_ID, i.Alumn_ID, #Note, NoteID, GETDATE(); FROM INSERTED i
END
My problem is:
How do i create the Log ID and the Note ID that i can't take from INSERTED i?
My second problem is, how do i insert the current date? when i try to execute the query it tells me that i can't use that variable in INSERTS.
My third problem, is how can i put the "Last change date"?
Fourth, is there a way to type an specific Note for example if only the name was changed it should say "Name was changed"?
Finally, The Note ID would be Varchar not identity and every note ID needs to be different
This is the current and only error that's preventing me from running the Query:
This is what i get Msg 273, level 16, state 1, procedure Log_Trigger, line 19 [Batch Start Line 0] me time stamp Use INSERT with a list of columns to exclude the timestamp column or insert DEFAULT in the timestamp column.
Here is how I would approach it.
How do i create the Log ID and the Note ID that i can't take from
INSERTED i?
The Log Id can be an AutoIdentity column. An INT column with IDENTITY INSERT.
The Note ID can be an Auto Incremented Computed column (shown in the code below). You would probably need to introduce a new column that serves as a prefix.
My second problem is, how do i insert the current date? when i try to
execute the query it tells me that i can't use that variable in
INSERTS.
GETDATE()?
My third problem, is how can i put the "Last change date"?
You can have a join with INSERTED and get the value from the log from a previous row. Shown in the code.
Fourth, is there a way to type an specific Note for example if only
the name was changed it should say "Name was changed"?
That would depend on finding the nature of the update on which column. This is more of a business question than a technical question.
Finally, The Note ID would be Varchar not identity and every note ID needs to be different
Now, the code (the entire schema)
CREATE TABLE LOG(
Log_ID INT IDENTITY(1, 1) NOT NULL,
Alumn_ID INT,
NOTE VARCHAR(200),
PREFIX VARCHAR(30),
NOTEID AS([PREFIX] + RIGHT('0000000' + CAST(Log_ID AS VARCHAR(7)), 7)) PERSISTED,
CHANGEDATE DATETIME,
LASTCHANGEDATE DATETIME
);
CREATE TABLE ALUMN(
Alumn_ID INT,
NAME VARCHAR(50),
COURSES INT,
FAVORITE_COURSE VARCHAR(50)
);
CREATE TRIGGER[trg_LOG]
ON ALUMN
AFTER UPDATE
AS
BEGIN
DECLARE #Note VARCHAR(50)
--DECLARE #Alumn_ID VARCHAR(50)
DECLARE #Lastchange DATETIME
--SELECT #Alumn_ID = INSERTED.Alumn_ID FROM INSERTED
SET #Note = 'Fields were updated'
SELECT #Lastchange = CHANGEDATE FROM LOG l
INNER JOIN INSERTED i ON l.Alumn_ID = i.Alumn_ID
--INNER JOIN ALUMN
INSERT INTO LOG(Alumn_ID, Note, Prefix, CHANGEDATE, LASTCHANGEDATE)
SELECT i.Alumn_ID, #Note, 'AUP', GETDATE(), #Lastchange FROM INSERTED i
END
how do i insert the current date? when i try to execute the query it
tells me that i can't use that variable in INSERTS.
SELECT Log_ID, i.Alumn_ID, #Note, NoteID, GETDATE(); FROM INSERTED i
Take the semi-colon out of the line above.
SELECT Log_ID, i.Alumn_ID, #Note, NoteID, GETDATE() FROM INSERTED i
I would like to know how can I read with a sql query a table like that:
(this is just an example)
id,date,information
1,2018-26-02,{[{"iteration_number":0,"data":{"name":"Toto",values:{"PV":78,"SV":20,"TV":19},"state":"ok"},{"iteration_number":1,"data":{"name":"Baba",values:{"PV":68,"SV":10,"TV":11},"state":"ok"}}}]}
For example, to select the date of the first record, I will write: "SELECT date FROM table1 WHERE id=1;
But if I just would like the name of the iteration number 0 ? (Toto)
Say me if I'm not understandable.
Thanks for your response.
Simon
In MSSQL there is a JSON_VALUE function you can use for this:
More documentation can be found here.
DECLARE #temp_table TABLE
(
id INT NOT NULL IDENTITY(1, 1),
date DATETIME NOT NULL,
information VARCHAR(MAX) NOT NULL
);
INSERT INTO #temp_table
(date, information)
VALUES
(GETDATE(), '[{"iteration_number":1,"data":{"name":"Toto",values:{"PV":78,"SV":20,"TV":19},"state":"ok"},{"iteration_number":1,"data":{"name":"Baba",values:{"PV":68,"SV":10,"TV":11},"state":"ok"}}}]');
SELECT date, JSON_VALUE(information,'$[0].data.name') AS Name
FROM #temp_table
I have this stored function
function GetPrevReading(
#utility int,
#asofdate datetime
) returns decimal(10,5)
This function returns the previous meter reading from the table with the following fieds:
utility - int
date - datetime
reading - numeric(18,4)
When I use select on this table I want to set a date as a parameter and get this from the table:
Utility Previous Reading
(distinct) GetPrevReading(utility from query, #date from parameter)
I want the function GetPrevReading to take parameter 'utility' from the current row.
Is it possible to accompish this with a query or should I make a stored procedure?
For example, this is the table:
Utility Date Reading
1 2013-10-1 105.6
1 2013-11-1 123.72
2 2013-10-1 226.1
2 2013-10-1 238.18
Now, if I set parameter #date to 2013-10-29 I should get this result:
Utility PreviousReading
1 105.6
2 226.1
Here, my function should get #utility=1 and #asofdate='2013-10-29' on the first row and #utility=2 and #asofdate='2013-10-29' on the second one.
Try this out. I fixed some inconsistencies in your data types, and assumed that your last line of sample data really should have had 2013-11-01 as the date. Also, the way that the function is written, it's not getting the previous reading, but the reading on that date.
CREATE TABLE MyTable (
Utility Int,
Date Date,
Reading Decimal(10,5)
);
INSERT INTO MyTable (Utility, Date, Reading)
VALUES
(1,'2013-10-01', 105.60),
(1,'2013-11-01', 123.72),
(2,'2013-10-01', 226.10),
(2,'2013-11-01', 238.18);
CREATE FUNCTION dbo.GetPrevReading(
#utility int,
#asofdate datetime
)
RETURNS Decimal(10,5)
AS
BEGIN
RETURN (
SELECT TOP 1 Reading
FROM MyTable
WHERE Utility = #Utility
AND Date = #asofdate
ORDER BY Date DESC
)
END;
SELECT
Utility
,Date
,dbo.GetPrevReading(Utility, Date)
FROM (
SELECT Utility, Max(Date) Date
FROM MyTable
WHERE Date < '2013-10-29'
GROUP BY Utility
) x;
Am I understanding the question; the function returns for this call
GetPrevReading( 1,2013-10-29)
Returns
1, 105.6
2, 226.1
And you want to join between the function and its results and the underlying table? You can do this in SQL 2005 + using the Apply join
Select
…
From tblUtilityReadings
Cross Apply GetPrevReading(tblUtilityReadings.utility, #date)
How to create a table with a timestamp column that defaults to DATETIME('now')?
Like this:
CREATE TABLE test (
id INTEGER PRIMARY KEY AUTOINCREMENT,
t TIMESTAMP DEFAULT DATETIME('now')
);
This gives an error.
As of version 3.1.0 you can use CURRENT_TIMESTAMP with the DEFAULT clause:
If the default value of a column is CURRENT_TIME, CURRENT_DATE or CURRENT_TIMESTAMP, then the value used in the new row is a text representation of the current UTC date and/or time. For CURRENT_TIME, the format of the value is "HH:MM:SS". For CURRENT_DATE, "YYYY-MM-DD". The format for CURRENT_TIMESTAMP is "YYYY-MM-DD HH:MM:SS".
CREATE TABLE test (
id INTEGER PRIMARY KEY AUTOINCREMENT,
t TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);
according to dr. hipp in a recent list post:
CREATE TABLE whatever(
....
timestamp DATE DEFAULT (datetime('now','localtime')),
...
);
It's just a syntax error, you need parentheses: (DATETIME('now'))
The documentation for the DEFAULT clause says:
If the default value of a column is an expression in parentheses, then the expression is evaluated once for each row inserted and the results used in the new row.
If you look at the syntax diagram you'll also notice the parentheses around 'expr'.
This is a full example based on the other answers and comments to the question. In the example the timestamp (created_at-column) is saved as unix epoch UTC timezone and converted to local timezone only when necessary.
Using unix epoch saves storage space - 4 bytes integer vs. 24 bytes string when stored as ISO8601 string, see datatypes. If 4 bytes is not enough that can be increased to 6 or 8 bytes.
Saving timestamp on UTC timezone makes it convenient to show a reasonable value on multiple timezones.
SQLite version is 3.8.6 that ships with Ubuntu LTS 14.04.
$ sqlite3 so.db
SQLite version 3.8.6 2014-08-15 11:46:33
Enter ".help" for usage hints.
sqlite> .headers on
create table if not exists example (
id integer primary key autoincrement
,data text not null unique
,created_at integer(4) not null default (strftime('%s','now'))
);
insert into example(data) values
('foo')
,('bar')
;
select
id
,data
,created_at as epoch
,datetime(created_at, 'unixepoch') as utc
,datetime(created_at, 'unixepoch', 'localtime') as localtime
from example
order by id
;
id|data|epoch |utc |localtime
1 |foo |1412097842|2014-09-30 17:24:02|2014-09-30 20:24:02
2 |bar |1412097842|2014-09-30 17:24:02|2014-09-30 20:24:02
Localtime is correct as I'm located at UTC+2 DST at the moment of the query.
It may be better to use REAL type, to save storage space.
Quote from 1.2 section of Datatypes In SQLite Version 3
SQLite does not have a storage class set aside for storing dates
and/or times. Instead, the built-in Date And Time Functions of SQLite
are capable of storing dates and times as TEXT, REAL, or INTEGER
values
CREATE TABLE test (
id INTEGER PRIMARY KEY AUTOINCREMENT,
t REAL DEFAULT (datetime('now', 'localtime'))
);
see column-constraint .
And insert a row without providing any value.
INSERT INTO "test" DEFAULT VALUES;
It is syntax error because you did not write parenthesis
if you write
Select datetime('now')
then it will give you utc time but if you this write it query then you must add parenthesis before this
so (datetime('now')) for UTC Time.
for local time same
Select datetime('now','localtime')
for query
(datetime('now','localtime'))
If you want millisecond precision, try this:
CREATE TABLE my_table (
timestamp DATETIME DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
);
This will save the timestamp as text, though.
This alternative example stores the local time as Integer to save the 20 bytes. The work is done in the field default, Update-trigger, and View.
strftime must use '%s' (single-quotes) because "%s" (double-quotes) threw a 'Not Constant' error on me.
Create Table Demo (
idDemo Integer Not Null Primary Key AutoIncrement
,DemoValue Text Not Null Unique
,DatTimIns Integer(4) Not Null Default (strftime('%s', DateTime('Now', 'localtime'))) -- get Now/UTC, convert to local, convert to string/Unix Time, store as Integer(4)
,DatTimUpd Integer(4) Null
);
Create Trigger trgDemoUpd After Update On Demo Begin
Update Demo Set
DatTimUpd = strftime('%s', DateTime('Now', 'localtime')) -- same as DatTimIns
Where idDemo = new.idDemo;
End;
Create View If Not Exists vewDemo As Select -- convert Unix-Times to DateTimes so not every single query needs to do so
idDemo
,DemoValue
,DateTime(DatTimIns, 'unixepoch') As DatTimIns -- convert Integer(4) (treating it as Unix-Time)
,DateTime(DatTimUpd, 'unixepoch') As DatTimUpd -- to YYYY-MM-DD HH:MM:SS
From Demo;
Insert Into Demo (DemoValue) Values ('One'); -- activate the field Default
-- WAIT a few seconds --
Insert Into Demo (DemoValue) Values ('Two'); -- same thing but with
Insert Into Demo (DemoValue) Values ('Thr'); -- later time values
Update Demo Set DemoValue = DemoValue || ' Upd' Where idDemo = 1; -- activate the Update-trigger
Select * From Demo; -- display raw audit values
idDemo DemoValue DatTimIns DatTimUpd
------ --------- ---------- ----------
1 One Upd 1560024902 1560024944
2 Two 1560024944
3 Thr 1560024944
Select * From vewDemo; -- display automatic audit values
idDemo DemoValue DatTimIns DatTimUpd
------ --------- ------------------- -------------------
1 One Upd 2019-06-08 20:15:02 2019-06-08 20:15:44
2 Two 2019-06-08 20:15:44
3 Thr 2019-06-08 20:15:44