1d9b3aeee7
The error format '##keyword' in a lot of docs. This pr is to repair document format. #4335
62 lines
1.7 KiB
Markdown
62 lines
1.7 KiB
Markdown
---
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{
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"title": "locate",
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"language": "zh-CN"
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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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# locate
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## description
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### Syntax
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`INT locate(VARCHAR substr, VARCHAR str[, INT pos])`
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返回 substr 在 str 中出现的位置（从1开始计数）。如果指定第3个参数 pos，则从 str 以 pos 下标开始的字符串处开始查找 substr 出现的位置。如果没有找到，返回0
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## example
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```
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mysql> SELECT LOCATE('bar', 'foobarbar');
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+----------------------------+
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| locate('bar', 'foobarbar') |
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+----------------------------+
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| 4 |
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+----------------------------+
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mysql> SELECT LOCATE('xbar', 'foobar');
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+--------------------------+
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| locate('xbar', 'foobar') |
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+--------------------------+
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| 0 |
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+--------------------------+
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mysql> SELECT LOCATE('bar', 'foobarbar', 5);
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+-------------------------------+
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| locate('bar', 'foobarbar', 5) |
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+-------------------------------+
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| 7 |
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+-------------------------------+
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```
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## keyword
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LOCATE
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