How to compare the date types of sql

In SQL, compare two date expressions using comparison operators (such as =, >) to determine their relationship. For example, startDate

SQL Date Type Comparison

In SQL, date types can be compared to determine the relationship between two dates. Here is how to compare date types in SQL:

method:

Use comparison operators (e.g. =, >, =,

grammar:

日期表达式1 比较运算符日期表达式2

Example:

 <code class="sql">startDate </code>

This query compares the relationship between startDate and endDate , and returns True if startDate is earlier than endDate ; otherwise, returns False .

Notes:

• Data Type: The comparison operator is only applicable to date type expressions.
• Time Zone: Make sure that the date expressions you compare use the same time zone.
• Null value processing: If one or two of the date expressions compared are NULL , the comparison result is NULL .
• Range comparison: You can use the BETWEEN operator to compare whether the date is within the specified range.

extend:

In addition to comparison operators, SQL provides other functions for handling date types:

• DATE_ADD(): Adds the specified time interval to the date.
• DATE_SUB(): Subtracts the specified time interval from the date.
• DATE_FORMAT(): Displays dates in a specific format.

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