$sql = "SELECT Passive, Q, W, E, R FROM champions WHERE Passive, Q, W, E, R IS NOT NULL AND Patch_Nochampion'];
SELECT Passive, Q, W, E, R,
((Passive is not null) + (Q is not null) + (W is not null) + (E is
我可以用某一特定列中字符的实例数来计算一列吗?| i | p || A | 3 || C | 0 || B | 1 || A | 1 || C | 0 |查询:GROUP BY i+---+----+----+-----+-----+-----+
| i | Sp | Cp | x3x | x1x | x0x |