mysql 删除语句(delete)用于删除表中的数据,格式为:delete from table_name where condition。1. 删除所有数据:delete from table_name; 2. 删除指定条件的数据:delete from table_name where column_name = value; 3. 删除多个条件的数据:delete from table_name where column_name1 = value1 and/or column_name
MySQL 删除语句:DELETE
DELETE 语句格式:
DELETE FROM table_name
WHERE condition;
语法解释:
- DELETE FROM table_name:指定要删除数据的表名。
- WHERE condition:指定删除数据的条件,可选。如果省略,则删除表中所有数据。
删除所有数据:
DELETE FROM table_name;
删除指定条件的数据:
DELETE FROM table_name
WHERE column_name = value;
其中,column_name 是表中的列名,value 是要匹配的条件值。
删除多个条件的数据:
DELETE FROM table_name
WHERE column_name1 = value1
AND/OR column_name2 = value2;
删除 BETWEEN 范围内的值:
DELETE FROM table_name
WHERE column_name BETWEEN start_value AND end_value;
删除 IN 列表中的值:
DELETE FROM table_name
WHERE column_name IN (value1, value2, ...);
注意事项:
- DELETE 语句是不可撤销的,在执行之前请确保正确。
- 如果使用了 WHERE 条件,确保条件是正确的,否则可能删除意外数据。
- 在删除大量数据之前,请考虑使用备份或事务以确保数据安全。
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