I don't know what I am doing. Extra new at this. Below I am trying to make corrections to the data on a column, with out losing any of the data, just overriding it. In this Column, some of the cells have characters spaces (spacebar) in them so it dose not show up as "NULL".
In my fist attempt, I can see the query data and it looks good, 100% correct. But don't know how to put that data into the table I got it from. So I need to replace the data in column 'Speedlink_IP' with my Queried results.
Thanks every one in advance!
1st Attempt -
SELECT NULLIF(LTRIM(RTRIM(Speedlink_IP)), '')
As Speedlink_IP
FROM Master_IP_Data
INSERT INTO TEMP1 (col1)
2nd attempt -
CREATE TABLE TEMP1 (
col1 varchar (50) NULL
);
SELECT NULLIF(LTRIM(RTRIM(Speedlink_IP)), '')
As Speedlink_IP
FROM Master_IP_Data
INSERT INTO TEMP1 (col1)
INSERT INTO dbo.Master_IP_Data (Speedlink_IP)
SELECT col1
FROM TEMP1
;
DROP Table TEMP1
You seem to be looking for a simple UPDATE statement.
UPDATE Master_IP_Data
SET Speedlink_IP = NULL
WHERE LTRIM(RTRIM(Speedlink_IP)) = ''
This query will turn to NULL values of Speedlink_IP that contains only spaces. You don't need to use a temporary table for this.
Related
I need help to write a SQL query that will replace values in one column by another column values in the same table. For example, given the following table, I want to replace values in column 2 by values in column 1. I think the "UPDATE table SET ..." clause would help but don't know how to use it. Can any one help me, please ?
enter image description here
UPDATE table t1
SET column1 = (SELECT column2 FROM table t2 WHERE t1.column1 = t2.column1);
I have table 1.
I have another empty table 2 with the following columns.
I want to insert into table 2 by selecting from table 1 - so I write the query as:
insert into table2(employee,id,zone,url)
select employee, id, zone, concat('https://',employee,'.com/',id,'?',zone)
from table1
Now my table 2 looks like this,
Now for the authcode column, I do the following and insert it into the table2.
insert into table2(authcode)
SELECT CONVERT(VARCHAR(10),HASHBYTES('MD5', substring(URL,8,100)),2)
from table2.
But the insert happens differently like this AS AN ENTIRE NEW SET OF ROWS.
Can someone help me to insert the last column to the corresponding rows instead of it creating a new one?
What you should be doing is UPDATE the table to fill the column authcode, but you could do it all in 1 step while you are inserting the rows:
insert into table2(employee,id,zone,url, authcode)
select
employee,
id,
zone,
concat('https://',employee,'.com/',id,'?',zone),
CONVERT(VARCHAR(10),HASHBYTES('MD5', substring(concat('https://',employee,'.com/',id,'?',zone),8,100)),2)
from table1
or if you want to update:
update table2
set authcode = CONVERT(VARCHAR(10),HASHBYTES('MD5', substring(URL,8,100)),2)
where authcode is null
The result you are seeing is the intended behavior for an INSERT statement. It will always insert new rows.
If you want to modify existing rows your need to use an UPDATE statement.
You can either modify your INSERT to look like what #forpas has posted to get all this work done in one step. Another option is to modify the second INSERT to be an UPDATE like the following:
update table2
set authcode = CONVERT(VARCHAR(10),HASHBYTES('MD5', substring(URL,8,100)),2)
The case I am trying to solve is this: for every row in a table another row from a second table might exist, so I need all data from the row of the first table and the data from the row of the second table if present.
I know I can use data structures as host variables to gather all data from a row in a table. So, my select is this:
select
t1.*
,t2.*
into
:dst1
,:dst2
from table1 t1
left join table2 t2 on t2.key=t1.key
;
where dst1 and dst2 are data structures respectively like table1 and table2 records' format. Pretty simple.
Now, the point is how to catch null result when a row for that key doesn't exist in the second table. In that case I would like to have the corresponding data structure initialized, but coalesce works on one field at a time and I haven't been able to find another solution.
Is there a way to obtain this result?
Any help would be appreciated!
Thanks
One way to deal with this is to use indicator variables. It looks like this:
dcl-ds hs Qualified;
field1 ...
field2 ...
endds;
dcl-s hsind Int(5) Dim(2);
exec sql
select *
into :hs:hsind
from table
fetch first row only;
Note, there is no comma (,) between :hs and :hsind as this is part of the same variable assignment. :hsind is an indicator variable, and in this case is an array of Int(5) with the same number of elements as the host data structure :hs has fields. The indicator variable will contain a 0 if the value in the associated field in :hs is good, or -1 if it is null. So in our example above: If hs.field1 is good, and hs.field2 is null, then hsind(1) = 0, and hsind(1) = -1. Other values mean other things like data mapping error (-2), or string truncation (positive number with original length of string).
So in your example, use something like this:
select
t1.*
,t2.*
into
:dst1:dst1ind
,:dst2:dst2ind
from table1 t1
left join table2 t2 on t2.key=t1.key
;
Where dst1ind is an array if Int(5) with the same number of elements as dst1 has subfields, similarly for dst2ind. Then after your selection, just check dst2ind(1) >= 0, and you have a good select. Notice that you will need to make sure that select into only returns a single row, or you will get errors about that.
I have Audit table with more than 50 columns and need to insert desired row (duplicate) by changing just one column value (column CreatedDate, set value to GETDATE()). I know this can be achieved by INSERT INTO SELECT * FROM but as there is more han 50 columns, code would seem messy:
INSERT INTO Audit_Table (Col1, Col2, .....CreatedDate, ......, Col50, ...ColN)
SELECT (Col1, Col2, .....GETDATE(), ......, Col50, ...ColN) FROM Audit_Table
WHERE Audit_Table.Id = Desired_Id
If i shouldn't change CreatedDate column value, it would be very simple:
INSERT INTO Audit_Table SELECT * FROM Audit_Table WHERE Audit_Table.ID = Desired_Id
Is there any other way to duplicate row and change only one/desired column value?
You can insert the record into a temporary table, update the CreatedDate column to GETDATE(), then insert it into the Audit_Table.
No. There is no way to say * except column_foo in SQL.
The workaround would be to generate the
SELECT
col1
, col2
, [...]
, coln
FROM foo;
statement (or parts of it) by querying the database's system catalogue for the column names in their order. There is always a table with all tables and a table with all columns.
Then, make sure you put the necessary commas in the right place (or remove them where you don't need them, or generate the comma in all rows of the report but the first - by using the ROW_NUMBER() OLAP function and evaluating whether it returns 1 or something else). Finally, edit the right date column, by replacing it with CURRENT_DATE or whatever your database uses for the current day.
Good luck -
Marco
You can build upon your existing idea. Just duplicate the row (I assume, you have an auto-incrementing primary key column) and then in a separate query update the time i.e.
Do this :
INSERT INTO Audit_Table SELECT * FROM Audit_Table WHERE Audit_Table.ID = Desired_Id
And then :
UPDATE Audit_Table SET CreatedDate = GETDATE() WHERE primaryKeyID = newPrimaryKeyID
Hope this helps!!!
try below as reference
you can use below statement to copy the all rows,
mysql> insert into newstudent select * from students;
you can use below statement to copy the specific row from table,
mysql> insert into newstudent
-> select id, name, age, address
-> from students
-> where
-> id = 1248;
you can use below statement to copy the either of the row from table,
mysql> insert into newstudent
-> select id, name, age, address
-> from students
-> where
-> id = 1248 or id=1249;
use limit clause also along with this
I want to select some data using simple sql and insert those data into another table. Both table are same. Data types and column names all are same. Simply those are temporary table of masters table. Using single sql I want to insert those data into another table and in the where condition I check E_ID=? checking part. My another problem is sometime there may be any matching rows in the table. In that time is it may be out sql exception? Another problem is it may be multiple matching rows. That means one E_ID may have multiple rows. As a example in my attachment_master and attachments_temp table has multiple rows for one single ID. How do I solve those problems? I have another problem. My master table data can insert temp table using following code. But I want to change only one column and others are same data. Because I want to change temp table status column.
insert into dates_temp_table SELECT * FROM master_dates_table where e_id=?;
In here all data insert into my dates_temp_table. But I want to add all column data and change only dates_temp_table status column as "Modified". How should I change this code?
You could try this:
insert into table1 ( col1, col2, col3,.... )
SELECT col1, col2, col3, ....
FROM table2 where (you can check any condition here on table1 or table2 or mixed)
For more info have a look here and this similar question
Hope it may help you.
EDit : If I understand your requirement properly then this may be a helpful solution for you:
insert into table1 ( col-1, col-2, col-3,...., col-n, <Your modification col name here> )
SELECT col-1, col-2, col-3,...., col-n, 'modified'
FROM table2 where table1.e_id=<your id value here>
As per your comment in above other answer:
"I send my E_ID. I don't want to matching and get. I send my E_ID and
if that ID available I insert those data into my temp table and change
temp table status as 'Modified' and otherwise don't do anything."
As according to your above statements, If given e_id is there it will copy all the columns values to your table1 and will place a value 'modified' in the 'status' column of your table1
For more info look here
You can use merge statement if I understand your requirement correctly.
Documentation
As I do not have your table structure below is based on assumption, see whether this cater your requirement. I am assuming that e_id is primary key or change as per your table design.
MERGE INTO dates_temp_table trgt
USING (SELECT * FROM master_dates_table WHERE e_id=100) src
ON (trgt.prm_key = src.prm_key)
WHEN NOT MATCHED
THEN
INSERT (trgt.col, trgt.col2, trgt.status)
VALUES (src.col, src.col2, 'Modified');
More information and examples here
insert into tablename( column1, column2, column3,column4 ) SELECT column1,
column2, column3,column4 from anothertablename where tablename.ID=anothertablename.ID
IF multiple values are there then it will return the last result..If not you have narrow your search..