I want to update the table and I am not known which column is going to update. Here is the simple example
Update tablename
set
if col1='A' then col1='IA',col2='XXX'
if col3='A' then col3='IA', col4='XXX'
where
(col1='A' and col2='UNKNOWN') or (col3='A' and col4='UNKNOWN')
Here either col1 or col3 surely contains 'A'
Please provide me correct query
Try this query
UPDATE tablename
SET col1=(CASE WHEN col1 LIKE 'A' THEN col1='IA' ELSE col1 END),
col2=(CASE WHEN col1 LIKE 'A' THEN col2='XXX' ELSE col2 END),
col3=(CASE WHEN col3 LIKE 'A' THEN col3='IA' ELSE col3 END),
col3=(CASE WEHN col3 LIKE 'A' THEN col4='XXX' ELSE col4 END)
WHERE
(col1='A' AND col2='UNKNOWN') OR (col3='A' AND col4='UNKNOWN')
And old post, but for those Googlers who stumble upon this. This won't work. e.g.
THEN col1='IA'
will return a boolean and set col1 to 1 i.e. true
Instead just return the 'IA' with THEN 'IA' ELSE col1 END
For clarity:
UPDATE tablename
SET col1=(CASE WHEN col1 LIKE 'A' THEN 'IA' ELSE col1 END),
col2=(CASE WHEN col1 LIKE 'A' THEN 'XXX' ELSE col2 END),
col3=(CASE WHEN col3 LIKE 'A' THEN 'IA' ELSE col3 END),
col3=(CASE WEHN col3 LIKE 'A' THEN 'XXX' ELSE col4 END)
WHERE
(col1='A' AND col2='UNKNOWN') OR (col3='A' AND col4='UNKNOWN')
