mysql where 条件中加 if 判断

格式：sql IF(<condition>, <value if true>, <value if false>) 例 SELECT * FROM table_name t WHERE IF ( t.a IS NOT NULL, t.d IN ( 'value1', 'value2', 'value3', 'value4' ), 1 = 1 ) AND t.c = '

>>阅读原文<<