看看標識列的值小於一定數目

Question

我想看看是否標識列的值小於1

IF (SELECT PKIdent FROM dbo.MyTable WHERE PKIdent < 1) 
PRINT 'Its less than one' 

Answer 1

這裏有兩種方法可以做到這一點：

IF ((SELECT min(PKIdent) FROM dbo.MyTable) < 1) 
    PRINT 'Its less than one' 

或

IF exists (SELECT PKIdent FROM dbo.MyTable WHERE PKIdent < 1) 
    PRINT 'Its less than one'