Insert Record or Update Record If Exists in Table In One Query in MySQL

Question

My Table

member_id - profil_id - A - B - C
1           2           1   0   0
1           3           0   1   0

I want to update record for ( member_id=1 and profil_id=2 and A=1 )

member_id - profil_id - A - B - C
1           2           2   0   0
1           3           0   1   0

and again, I want to update record for ( member_id=1 and profil_id=2 and A=1 )

member_id - profil_id - A - B - C
1           2           3   0   0
1           3           0   1   0

I want to insert record for ( member_id=1 and profil_id=4 and A=1 )

member_id - profil_id - A - B - C
1           2           3   0   0
1           3           0   1   0
1           4           1   0   0

and again I want to update record for ( member_id=1 and profil_id=4 and C=1 )

member_id - profil_id - A - B - C
1           2           3   0   0
1           3           0   1   0
1           4           1   0   1

and again I want to update record for ( member_id=1 and profil_id=4 and C=1 )

member_id - profil_id - A - B - C
1           2           3   0   0
1           3           0   1   0
1           4           1   0   2

like this...

thanks..

Answer 1

There are two ways of doing this in MySQL. The first is using REPLACE . The second is using INSERT...ON DUPLICATE KEY UPDATE .

REPLACE will try a delete row, and regardless of success or failure, insert the new row.

INSERT...ON DUPLICATE KEY UPDATE will try and insert a row and if the insert fails due to a duplicate key on an index error, does an update.