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22 Σεπ 2015 · UPDATE ( SELECT a.user_id, a.user_name, b.user_name as user_user_name FROM some_table a LEFT OUTER JOIN user_table b ON a.user_id = b.user_id WHERE a.user_id IS NOT NULL ) SET user_name = CASE WHEN user_user_name IS NOT NULL THEN user_user_name ELSE 'UNKNOWN' END;
9 Ιουν 2021 · A CASE expression can only return a value, not a fragment of a query. In order to parametrise which column should receive the value passed as an argument, you could try this approach: UPDATE. PERSON.
The UPDATE statement is used to modify the existing records in a table. UPDATE Syntax. UPDATE table_name. SET column1 = value1, column2 = value2, ... WHERE condition; . Note: Be careful when updating records in a table! Notice the . WHERE clause in the UPDATE statement. The WHERE clause specifies which record (s) that should be updated.
UPDATE (SELECT tt.id, tt.code, tt.description, st.code AS st_code, st.description AS st_description FROM dest_tab tt, source_tab st WHERE tt.id = st.id AND st.id = 2500) ilv SET ilv.code = ilv.st_code, ilv.description = ilv.st_description; -- Rows limited by the WHERE clause of the UPDATE.
26 Φεβ 2017 · Update query using case and joins Table 1: select * from FVTable 2: select * From DB_FV_WUPDATE DB_FV_W Set FV_02 = (CASE WHEN db.FV_02 IS NULL THEN '0' Else fv.MD END) FROM DB_FV_W d LEFT OUTER JOIN FV f On d.Store_ID = f.Store_ID WHERE d.year = '2016'
26 Απρ 2017 · Your CASE is almost correct, but to be able to do a separate join, you have to use a subquery: UPDATE a SET Material = CASE WHEN Element <= 300000 THEN 80000 ELSE (SELECT b.Material FROM b WHERE a.PCOMP = b.PCOMP AND a.Ply = b.Ply) END;
15 Αυγ 2017 · UPDATE mytable m SET name = (WITH temp AS (SELECT 'abcd' AS oldvalue, 'defg' AS newvalue FROM DUAL UNION ALL /* Use UNION ALL instead of UNION in this case */ SELECT 'efgh' AS oldvalue, 'klmn' AS newvalue FROM DUAL) SELECT newvalue FROM temp WHERE temp.oldvalue = m.name)
