I'm trying to overwrite values that are found in TYPE1 with values that are found in TYPE2.
I wrote this SQL to try it out, but for some reason it isn't updating:
select * from stuff
update stuff
set TYPE1 = TYPE2
where TYPE1 is null;
update stuff
set TYPE1 = TYPE2
where TYPE1 ='Blank';
http://www.sqlfiddle.com/#!3/a4733/17
Any reason why my values in TYPE1 are not updating?
This works for me
select * from stuff
update stuff
set TYPE1 = TYPE2
where TYPE1 is null;
update stuff
set TYPE1 = TYPE2
where TYPE1 ='Blank';
select * from stuff
UPDATE a
SET a.column1 = b.column2
FROM myTable a
INNER JOIN myTable b
on a.myID = b.myID
in order for both "a" and "b" to work, both aliases must be defined
TYPE1 with the value from TYPE2 IN THE SAME TABLE.
UPDATE TABLE_NAME SET COLUMN_A = COLUMN_B;
Much easier. At least on Oracle SQL, i don't know if this works on other dialects as well.
UPDATE table_name SET column_1 = cast(split_part(column_2, ' ', 1) as float);
You put select query before update queries, so you just see initial data. Put select * from stuff; to the end of list.
This answer about updating column from a part of another column in the same table.
update T1
set domainname = (New value) --Example: (SELECT LEFT(TableName.col, CHARINDEX('@',TableName.col)-1) STRIPPED_STRING FROM TableName where TableName.col = T2.Emp_ID)
from TableName T1
INNER JOIN
TableName T2
ON
T1.ID= T2.ID;
update TABLE_1 a set COLUMN_1 = (select COLUMN_2 from TABLE_1 b where a.ID = b.ID)
SET or WITH expected, got 'a'Your select statement was before the update statement see Updated fiddle
UPDATE `tbl_user` SET `name`=concat('tbl_user.first_name','tbl_user.last_name') WHERE student_roll>965
If you need to make an operation on a specific column:
update courses set hours = days * 5
You can simply do this .
Update TableName SET Column1=Column2 where id=id
