舉例如下： 

數(shù)據(jù)表為DemoTable，字段有id, condition1,condition2,condition3,condition4,condition5 

要求是查詢DemoTable中，condition1,condition2,condition3,condition4,condition5五個(gè)字段中符合任意兩個(gè)或兩個(gè)以上的條件的內(nèi)容。 

可使用case when來(lái)實(shí)現(xiàn)這個(gè)條件，需要嵌套子查詢語(yǔ)句 

sql語(yǔ)句代碼示例如下： 

復(fù)制代碼代碼如下:

SELECT * FROM DemoTable 
WHERE ((SELECT CASE 1 WHEN condition1滿足條件 THEN 1 ELSE 0 END FROM DemoTable ) 
+(SELECT CASE 1 WHEN condition2滿足條件 THEN 1 ELSE 0 END FROM DemoTable) 
+(SELECT CASE 1 WHEN condition3滿足條件 THEN 1 ELSE 0 END FROM DemoTable) 
+(SELECT CASE 1 WHEN condition4滿足條件 THEN 1 ELSE 0 END FROM DemoTable) 
+(SELECT CASE 1 WHEN condition5滿足條件 THEN 1 ELSE 0 END FROM DemoTable))>=2