<>,!= 运算符说明 语法结构 示例 <>,!= 运算符说明 The <>,!= operator returns true only if the left-hand operand is not equal to the right-hand operand. 语法结构 > SELECT x <> y ; ...
<>,!= 运算符说明 语法结构 示例 <>,!= 运算符说明 The <>,!= operator returns true only if the left-hand operand is not equal to the right-hand operand. 语法结构 > SELECT x <> y ; ...
Subqueries with IN Description Syntax Examples Constraints Subqueries with IN Description A subquery can be used with the IN operator as “expression IN (subquery)”....