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How to write sql modification statement

王林
Release: 2020-06-16 09:04:19
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How to write sql modification statement

sql update statement writing:

UPDATE table_name
SET column1=value1,column2=value2,...
WHERE some_column=some_value;
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Note:

The WHERE clause specifies which record or records need to be updated . If you omit the WHERE clause, all records will be updated!

In MySQL, you can solve this problem by setting the built-in parameter sql_safe_updates. When this parameter is turned on, you must carry the where condition after the update statement. Otherwise, an error will be reported.

Opening method:

set sql_safe_updates=1; 表示开启该参数
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Recommended tutorial: mysql tutorial

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