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, ....
I have a table TOPIC_VISIT_HISTORY with over a million records containing user visits. I need to compute the aggregate user visits per topic from this table and insert it into the TOPIC table. I'm using a SQL query like UPDATE TOPIC SET VISIT_COUNT = (SELECT count(DISTINCT USER_ID)...
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 ...
另一种常用的插入记录语句是INSERT INTO SELECT语句。它允许我们从一个表中选择数据并插入到另一个表中。 下面是一个示例: INSERT INTO table_name (column1, column2, column3, ...) SELECT column1, column2, column3, ... FROM another_table WHERE condition; 1. 2. 3. 4. 其中,table_name是要插...
SELECT column1, column2, column3, ... 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: ...
可以使用INSERT INTO table_name SELECT * FROM another_table;从另一个表中检索数据并插入到目标表。如果需要，可以使用WHERE子句过滤数据。避免主键冲突：如果表中存在主键或唯一索引，插入相同值时会引发错误。确保插入的数据不违反这些约束。分区表插入：对于分区表，可以使用PARTITION关键字指定数据插入的...
INSERT INTO table_name (column1, column2, column3) SELECT column1, column2, column3 FROM another_table WHERE condition; 全选代码 复制 这样可以将符合条件的多条数据从一个表中选择出来,并插入到指定的表中。 3. 使用LOAD DATA INFILE语句导入多条数据 ...
Tx1: SELECT ... INSERT INTO user (name) SELECT 1000 rows from another table ... # Bulk ...
Copy only some columns from one table into another table: INSERT INTO table2 (column1, column2, column3, ...)SELECT column1, column2, column3, ...FROM table1WHERE condition; 1.我的初衷是把同一个表里的某一行的数据进行复制,制作多条重复用来测试使用,比如测试脚本升级后重复数据被处理消失,...
I am trying to insert rows into a table from another table when records in the second table does not exist in the first one. I am using the following code : INSERT INTO kleur (produk) SELECT t1.produk FROM verkope t1 WHERE NOT EXISTS(SELECT produk ...