WebDelete from table if the id doesn't exists in another table Ask Question Asked 9 years, 5 months ago Modified 6 years, 2 months ago Viewed 10k times 7 I want to delete the id's from types that can't be found in types_photos but I don't know how I can accomplish this. id_type in types_photos are the same as id in types. WebFeb 9, 2013 · DELETE FROM TableA WHERE EXISTS (SELECT * FROM TableB WHERE (TableB.ID1 IS NULL AND TableA.ID1 IS NULL OR TableB.ID1 = TableA.ID1) AND (TableB.ID2 IS NULL AND TableA.ID2 IS NULL OR TableB.ID2 = TableA.ID2) ) Share. …
Delete rows depending on values from another table
WebApr 11, 2015 · Using NOT EXISTS: DELETE FROM BLOB WHERE NOT EXISTS(SELECT NULL FROM FILES f WHERE f.id = fileid) Using NOT IN: DELETE FROM BLOB WHERE fileid NOT IN (SELECT f.id FROM FILES f) ... (select from ) This deletes the row when the first column doesn't appear … WebJul 31, 2024 · Subsequent testing at 5mil and 10mil table sizes showed the if exists were about 60% the time of a join. In SQL Server, when using not exists, you need to set an alias for the table to be connected, and in the delete statement, to specify the table to delete rows from. Trying to delete when not exists is not working. advinia stonedale lodge
Delete from table if the id doesn
WebJan 11, 2024 · DELETE A FROM table1 AS A WHERE EXISTS ( SELECT 1/0 FROM table2 B WHERE B.id = A.id ); If you were to just run SELECT 1/0 you'd get a divide by zero … WebMay 26, 2024 · Select rows which are not present in other table; ② "order" is a reserved word in SQL. Better chose a legal identifier, or you have to always double-quote. ③ I made it RETURNS int to signify whether the row was actually deleted. The function returns NULL if the DELETE does not go through. Optional addition. WebJul 5, 2024 · I need to implement a check to see if TableA exists, if it does, drop the entire table. If it doesn't, i will create the table. I couldn't really find out if this is possible to implement on VBA / MS Access. In SQL we can use: DROP TABLE IF EXISTS dbo.TableA Anybody has any idea how this can be implemented? Thank you! k2 インラインスケート 口コミ