举例如下：

数据表为DemoTable，字段有id, condition1,condition2,condition3,condition4,condition5

要求是查询DemoTable中，condition1,condition2,condition3,condition4,condition5五个字段中符合任意两个或两个以上的条件的内容。

可使用case when来实现这个条件，需要嵌套子查询语句

sql语句代码示例如下：

复制代码 代码如下:

SELECT * FROM DemoTable

WHERE ((SELECT CASE 1 WHEN condition1满足条件 THEN 1 ELSE 0 END FROM DemoTable )

+(SELECT CASE 1 WHEN condition2满足条件 THEN 1 ELSE 0 END FROM DemoTable)

+(SELECT CASE 1 WHEN condition3满足条件 THEN 1 ELSE 0 END FROM DemoTable)

+(SELECT CASE 1 WHEN condition4满足条件 THEN 1 ELSE 0 END FROM DemoTable)

+(SELECT CASE 1 WHEN condition5满足条件 THEN 1 ELSE 0 END FROM DemoTable))>=2