I have a table with an entire column that contains integers. I know that these integers were previously datetime values. I want to update all values in this column to be datetimes. There are 1000+ plus rows. I've altered this column from an INT to varchar since all the errors I received didn't like me going from an INT to DATETIME but I am having the same issue with the varchar data type.
Example values in the column: 43873, 40706, 43873, ect
I have tried the following queries:
UPDATE WORKER SET INT_TIME = DATEFROMPARTS(INT_TIME,1,1);
UPDATE WORKER SET INT_TIME = CONVERT(datetime,INT_TIME,107);
I receive errors like
Conversion failed when converting date and/or time from character
string.
INT_TIME is the column I am trying to update all values to a datetime:
These look like Excel format. That suggests something like:
select dateadd(day, col, '1899-12-30')
ALTER TABLE [dbo].[WORKER]
ALTER COLUMN [INT_TIME] DATETIME
This statement alters the integer column to a datetime column and parses the values automatically.
You can use dateadd() function :
select dateadd(day, t.int_time, 0) as joining_date
from tabel t;
You can use update statement to update , before that you need to alter table definition also :
alter table worker
alter column int_time DATETIME
update worker
set int_time = dateadd(day, t.int_time, 0)
0 have a default date 1900-01-01 00:00:00.000
Related
I have a question related to the conversion of varchar to datetime.
This topic was covered already in the thread
SQL Server Convert Varchar to Datetime
but I would like to advance it bit further.
I have performed BULK INSERT into predefined tables where VARCHAR(255)
is the destination. I have a table dbo.USR_02_ALL_RAW and the field GLTGB which
holds strings in the following format: 07/16/2016.
I can convert it as a single string by the following code:
DECLARE #Date varchar(255)
set #Date= '07/16/2016'
SELECT CONVERT(datetime,RIGHT(#Date,4)+LEFT(#Date,2)+SUBSTRING(#Date,4,2))
and it gives me a result:
2016-07-16 00:00:00.000
However I would like to pass to the code the whole field GLTGB from the table
dbo.USR_02_ALL_RAW, convert it from VARCHAR into DATETIME and update the field GLTGB with these results.(converting the whole field from varchar to datetime)
Thank you!
First clear this, you want to Bulk insert or Bulk update. Since you already have a column GLTGB. If you want to update the value only.
update tab set GLTGB =
CONVERT(datetime,RIGHT(GLTGB,4)+LEFT(GLTGB,2)+SUBSTRING(GLTGB,4,2))
Or
If you want to update the field from varchar to datetime. Then process is little bit lengthy.
Alter table tab add newcol datetime --- Add new datetime type column
update tab set newcol =
CONVERT(datetime,RIGHT(GLTGB,4)+LEFT(GLTGB,2)+SUBSTRING(GLTGB,4,2)) --- update value in new column
Alter table tab drop column GLTGB --- drop GLGTB column
Alter table tab add GLGTB datetime --- add GLGTB column as datetime type
update tab set GLGTB = newcol --- update value from GLGTB from newcol
Alter table tab drop column newcol ---- remove unnecessary newcol
If you convert a value to datetime, then update the same database column it came from with the value then, since that column is still varchar, SQL will have to convert the value back to varchar again in order to store it. So you can't achieve anything useful with that kind of simple approach.
f you want to actually change the data type of the column, and also convert all the values, then I think you need to go through the following process:
1) Create a new varchar column in your table (which will be temporary)
2) copy all the data values from the GLTGB column into the new column (using an UPDATE statement)
3) Drop the GLTGB column
4) Re-create it with the same name but with datetime type
5) Use an UPDATE statement to re-populate the new GLTGB column from your temporary column
6) Finally, drop the temporary column
There may be a simpler way but that seems like the obvious process.
You can use the following code for updating but before that, you need to change the data type of your field to DateTime
update dbo.USR_02_ALL_RAW
set GLTGB=cast(CONVERT(datetime,RIGHT(#Date,4)+LEFT(#Date,2)+SUBSTRING(#Date,4,2)) as datetime)
I am trying to convert nvarchar(5) year of birth (e.g. 1972) to a datetime (e.g. 1972-06-01) in a SQL Server table.
Something like:
UPDATE TableName
SET DateOfBirth = CONVERT(datetime, YearOfBirth + '/01/01', 103)
This throws an error
Conversion failed when converting date and/or time from character string
How can I solve this?
What you are doing needs two steps: store the value in the column as a date and then change the type.
In your case, a third step is needed, so the column is big enough to store the value string representation of the date value. I think this will work in SQL Server:
ALTER TABLE TableName ALTER COLUMN DateOfBirth NVARCHAR(32);
UPDATE TableName
SET DateOfBirth = YearOfBirth + '-01-01';
ALTER TABLE TableName ALTER COLUMN DateOfBirth Date;
The first ALTER TABLE alters the column to be wide enough for the new month and day. Then the date is constructed in a standard format (okay, leaving out the hyphens would be even more standard). Then the column is transformed to a date.
If you just want something that looks like a date -- and a lot of criticism on Stack Overflow ;) -- you can eliminate the third step.
This is all you need
UPDATE TableName
SET DateOfBirth = YearOfBirth + '-06-01'
Where YearOfBirth = '1972'
I have a table, in TSQL, with a field containing data in YYYYMMDD format saved as varchar(50);
I want to add a date type column to the table for each of the corresponding records in this field.
Any ideas?
Assuming that you have stored correct format of date in your field (eg you don't have '20121433'), this script should works for you:
ALTER TABLE your_table
ADD your_field_Date DATETIME
UPDATE your_table
SET your_field_Date = CONVERT(DATETIME, your_field_varchar, 112)
ALTER TABLE your_table DROP COLUMN your_field_varchar
I have table named as dbo.SetCustomerRFMComData with eight columns.
In which the third column name is RecDatetime whose DataType is DATETIME
I update the table using an stored procedure.
How to add current Datetime in RecDateTime column while firing an UPDATE QUERY
In SQL Server use GETDATE() .
In MySQL and PostgreSQL , use NOW().
In Oracle , use SYSDATE.
Call GETDATE() method which will update you current date time
Suppose your sp looks like this
create procedure sp_proc
(
#RecTime Datetime
)
as
begin
set #RecTime =DateTime()
update tablename values(RecTime=#RecTime )
end
I am relatively new to SQL Server so I was wondering how to convert the data type from varchar to date format? I have a few thousands records so I need a query to help to convert the varchar to date in a single query.
I have the date in this format: yyyymmdd, in varchar(8) and I want to convert this into yyyymmdd, in date format.
Is there any queries to help me with this?
For various conversions between VARCHAR and DATETIME have a look at this link.
Actually in your case, since your VARCHAR is in yyyymmdd format, you could just:
convert(datetime, YourVarcharDateField, 112)
Simply Use this Inbuilt CONVERT Function, and Check this Link for formatting Dates
-- Use 101 if you have divider in your date
SELECT convert(datetime, '2014-01-02',101) as [DateTime]
-- Use 112 if you don't have divider in your date
SELECT convert(datetime, '20140131',112) as [DateTime]
Edited:
UPDATE yourTable SET field = convert(datetime, 'yourFieldName',112)
--This will update all of your field regardless of any particular row
--If you want to update any particular set of rows use `WHERE` clause
if you have more various formats goto to the given link.
Data types can be converted either implicitly or explicitly.
Implicit conversions are not visible to the user. SQL Server automatically converts the data from one data type to another. For example, when a smallint is compared to an int, the smallint is implicitly converted to int before the comparison proceeds.
Explicit conversions use the CAST or CONVERT functions.
The CAST and CONVERT functions convert a value (a local variable, a column, or another expression) from one data type to another
convert(datetime, '2013-05-04',101)
CAST ( expression AS data_type )
ALTER TABLE [dbo].[table] ADD ConvertedDate Date
UPDATE [dbo].[SysData] SET ConvertedDate = CAST(VarCharDate as Date)
ALTER TABLE [dbo].[table] DROP COLUMN VarCharDate
Use CAST OR CONVERT function to convert string to date
Try this:
SELECT CAST('20140102' AS DATE) AS convertedDate;
SELECT CAST(colName AS DATE) AS convertedDate FROM tableA; -- Replace column name and table name
OR
SELECT CONVERT(DATE, '20140102', 112) AS convertedDate;
SELECT CONVERT(DATE, colName, 112) AS convertedDate FROM tableA; -- Replace column name and table name
OUTPUT of both queries:
|convertedDate|
|-------------|
|2014-01-02 |
In SQL SERVER, there are two types of built in conversion techniques.
Convert
Cast
Convert having its own defaults so it will be outdated in upgraded version of SQL SERVER
better make use of CAST Conversion technique
In your scenario.Already having the date with datatype of Varchar(8) trying to Convert into Date
Solve in systematic manner.
Adding the one new Column in the existing table.
Alter Table Table_name Add changedDataTypeDate Date
Update the values in varchar datatype to Date Datatype
UpDate Table_name Set ChangedDataTypeDate = CAST(OriginalDataTypeDate as Date)
Again change the new column name into old column name.
Sp_Rename 'Tablename.changedDataTypeDate','OriginalDataTypeDate','COLUMN'
Its done.
Based on u r requirement.
Alter Table customer Add Purchase_Changedtype Date
Update Customer set Purchase_changedtype = CAST(Purchase_date as Date)
(If u need Time also replace Datetime istead of Date)
Alter table Customer Drop column Purchase_date
Sp_Rename 'Customer.Purchase_ChangedType','Purchase_Date','Column'