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sql 查询语句 whErE 后面如果加多个条件

where后加多个条件可以用and来连接。 如,student表中有如下数据: 现在要查,sex为男,age为20的那些数据,可用如下语句: select * from student where sex='男' and age=20;结果截图:

select * from a where b in(‘1’ , ‘2’, ‘3’) and c '4' select * from a where b like '%1%' and b like '%2%' and b like '%3%' and c not like '%4%'

条件用and连接 例如 .....where a.id=1 and a.name='张三'

select * from a where b in(‘1’ , ‘2’, ‘3’) and c '4'

你没有指定别名,有歧义了,改成下面的: SELECT id,title,softlinks FROM dede_addonsoft d1,dede_archives d2 WHERE d1.aid=d2.id and d2.arcrank=0 and d2.typeid=13 into outfile 'e:\1.txt'

where id ='参数' and (grade = '2' or name like '%参数%') 加个括号就可以了

WITH TBL(BUSINESS_FLG, MAKER_ID, MAKER_NM, VIN, MAP_CD, SERIAL_NO, TYPE, USER_ID, ISSUE_TIMESTAMP,KEY_RESULT, ERR_CAUSE, ERR_SEQ, SEQ, MAC_ADDRESS) AS ( SELECT KEY_HST_TBL.BUSINESS_FLG ,KEY_HST_TBL.MAKER_ID ,MAKER_NM ,VIN ,MAP_...

select * from table where f1=' your value' and f2='value2' or f3='value3' and 二个都为真 or 只要有一个条件为真

之前在搜索这个问题,我是用这样类似的逻辑: select* from table where(casewhen A is null then (case when num is NULL then 1 else 0 end) else (case when num=A then 1 else 0 end) end)=1

简单给你说明一下: A表:ID,NAME B表:ID,NAME select * from a id,name 1,张三 2,李四 select * from b id,name 1,张三 2,李四 3, 赵五 select a.*,b.* from a,b where a.id=b.id(+) id,name id,name 1,张三 1,张三 2,李四 2,李四 select a....

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