Oracle----Operator

Operator  Description
=  Equal
<> or !=  Not equal
< Less than
> Greater than
<= Less than or equal
>= Greater than or equal
ANY Compares one value with any value in a list
ALL  Compares one value with all values in a list

hmetic operator

Comparison Operator

There are many comparison operators that you can use in a WHERE clause:

The following table lists the comparison operators:

Logical Operator

Null Values

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Variable

Comments

Terminology

Database Normalization

原文地址:https://www.cnblogs.com/daishuguang/p/4059985.html