1d9b3aeee7
The error format '##keyword' in a lot of docs. This pr is to repair document format. #4335
60 lines
2.2 KiB
Markdown
60 lines
2.2 KiB
Markdown
---
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{
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"title": "datediff",
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"language": "en"
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}
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---
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<!--
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Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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distributed with this work for additional information
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regarding copyright ownership. The ASF licenses this file
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to you under the Apache License, Version 2.0 (the
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"License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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KIND, either express or implied. See the License for the
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specific language governing permissions and limitations
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under the License.
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-->
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# datediff
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## Description
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### Syntax
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'DATETIME DATEDIFF (DATETIME expr1,DATETIME expr2)'
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Expr1 - expr2 is calculated and the result is accurate to the sky.
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Expr1 and expr2 parameters are valid date or date/time expressions.
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Note: Only the date part of the value participates in the calculation.
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### example
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```
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mysql> select datediff(CAST('2007-12-31 23:59:59' AS DATETIME), CAST('2007-12-30' AS DATETIME));
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+-----------------------------------------------------------------------------------+
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| datediff(CAST('2007-12-31 23:59:59' AS DATETIME), CAST('2007-12-30' AS DATETIME)) |
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+-----------------------------------------------------------------------------------+
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| 1 |
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+-----------------------------------------------------------------------------------+
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mysql> select datediff(CAST('2010-11-30 23:59:59' AS DATETIME), CAST('2010-12-31' AS DATETIME));
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+-----------------------------------------------------------------------------------+
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| datediff(CAST('2010-11-30 23:59:59' AS DATETIME), CAST('2010-12-31' AS DATETIME)) |
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+-----------------------------------------------------------------------------------+
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| -31 |
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+-----------------------------------------------------------------------------------+
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```
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## keyword
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DATEDIFF
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