在MySQL中,我们可以使用INSERT INTO语句将查询结果插入到另一个表中。其基本语法如下: INSERTINTOtable_name(column1,column2,column3,...)SELECTcolumn1,column2,column3,...FROManother_tableWHEREcondition; 1. 2. 3. 4. INSERT INTO table_name:指定要插入数据的目标表。 (column1, column2, column3, ....
* @param tableNameSource 源数据表名称 * @param dataBaseNameTarget 目标数据库名称 * @param tableNameTarget 目标数据表名称 */ public static void copyDataFromOneTable2AnotherWithSelectAndCreateSql(String dataBaseNameSource,String tableNameSource, String dataBaseNameTarget,String tableNameTarget){ conn ...
Re: Insert into table from another table if not exist Gideon Engelbrecht June 01, 2021 12:39AM Sorry, you can't reply to this topic. It has been closed. This forum is currently read only. You can not log in or make any changes. This is a temporary situation. ...
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⑥.修改列名(必须带上参数):mysql> alter table <table> change <old field> <new field> <type> [other]; 4.批量导出数据: 从同一数据库导入:INSERT INTO <table> SELECT field1,field2,field2,..., FROM <another table>; 从不同数据库导入:INSERT INTO <database.table> SELECT field1,field2,fie...
子查询的语法错误:子查询本身可能存在语法错误,导致整个INSERT语句出现错误。在编写子查询时,应确保其语法正确,并且能够独立运行。 以下是一个示例,演示如何在INSERT语句中使用子查询: 代码语言:sql 复制 INSERTINTOtable_name(column1,column2,column3)SELECTvalue1,value2,value3FROManother_tableWHEREcondition; ...
INSERT INTO table_name(column_list) SELECT select_list FROM another_table WHERE condition; INSERT ON DUPLICATE KEY UPDATE statement(插入更新数据)如果目标表里已经存在相同的主键,则执行下面的更新字段的SQLINSERT INTO table (column_list) VALUES (value_list) [SELECT ...FROM ... WHERE] ON DUPLICATE ...
FROM another_table WHERE condition; 将table1中的数据插入到table2中: INSERT INTO table2 (field1, field2) SELECT col1, col2 FROM table1; 批量插入 批量插入是一种高效的方法,特别适用于需要插入大量数据的场景,以下展示两种批量插入的方式:
DELETE FROM copy_emp; 删除中的数据完整性错误 DELETE FROM departments WHERE department_id = 60; 说明:You cannot delete a row that contains a primary key that is used as a foreign key in another table. 4. MySQL 8 新特性:计算列 什么叫计算列呢?简单来说就是某一列的值是通过别的列计算得来...
May 25, 2021 04:09AM Re: Insert into table from another table if not exist Peter Brawley May 25, 2021 07:46AM Re: Insert into table from another table if not exist Gideon Engelbrecht June 01, 2021 12:39AM Sorry, you can't reply to this topic. It has been closed. ...