我如果想指定多个条件怎么写呢

Answer 1

How should I write if I want to specify multiple conditions-PHP Chinese website Q&A-What should I write if I want to specify multiple conditions-PHP Chinese website Q&A

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Answer 2

如果有两个条件的话，可以这么写SELECT* from tb where a字段=‘x’ or a字段=‘y’，或者SELECT* from tb where a字段=‘x’ anda字段=‘y’；

当然你如果条件多了，还可以加() 如: 

SELECT* from tb where (a字段='x' or a字段='y') and b字段='zzz'