4. Insert both from columns and defined values. In case you insert data into multiple columns, but only some columns need to import from the table_b, some columns need to import from another set of data: INSERT
Optimize : Insert into a table using SELECT from another tablePosted by: Sam Michaels Date: May 12, 2009 04:18PM 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 ...
方法二:使用INSERT INTO … SELECT语句 第二种方法是使用INSERT INTO … SELECT语句,将数据从一个表中选择出来,然后插入到另一个表中。下面是一个示例代码: INSERTINTOtable_name(column1,column2,column3)SELECTcolumn1,column2,column3FROManother_table; 1. 2. 上述代码中,table_name是要插入数据的表名,colu...
-- 简单的 INSERT SELECTINSERTINTOTargetTable(id,data)SELECTid,dataFROMSourceTableWHEREcondition;-- 带 JOIN 的 INSERT SELECTINSERTINTOTargetTable(id,data)SELECTa.id,b.dataFROMSourceTable aJOINAnotherSource bONa.id=b.id; 1. 2. 3. 4. 5. 6. 7. 8. 9. 在生态工具链方面,INSERT SELECT可以与...
You can insert multiple records into a table from another table using theINSERT FROM SELECTstatement, which is a derivative of the basicINSERTstatement. The column ordering and data types must match between the target and the source tables. ...
示例: ```sql INSERT OVERWRITE TABLE table_name SELECT column1, column2, ... FROM another_table WHERE condition; ``` 该语句会首先删除目标表中的所有数据,然后将查询结果插入目标表。查询结果必须与目标表的结构相匹配,即查询的列数和数据类型必须与目标表中的列数和数据类型相同。©...
在SQL的insert语句中使用select语句中的值,可以通过子查询来实现。 子查询可以嵌套在insert语句的values子句中,将select语句的结果作为插入的值。具体步骤如下: 编写select语句来获取需要插入的值。例如,假设有两个表:表A和表B。我们想要将表B中的某些列的值插入到表A中,可以编写如下的select语句: 编写select语句来...
具体来说,当我们需要将一个表的查询结果插入到另一个表的列中时,可以使用SQLite的INSERT INTO SELECT语句。该语句的语法如下: 代码语言:txt 复制 INSERT INTO table_name (column_name) SELECT column_name FROM another_table WHERE condition; 其中,table_name是目标表的名称,column_name是目标表中要插入数据的...
3. Inserting Values From SELECT Statement Let’s discuss the syntax for inserting data from a SELECT statement into another table: INSERTINTOtarget_table(column1, column2, ...)SELECTcolumn1, column2FROMsource_tableWHEREcondition;Copy In the above query,INSERT INTO target_tablespecifies thetarget_...
SELECT*FROMtable1 WHEREcondition; Copy only some columns from one table into another table: INSERTINTOtable2(column1,column2,column3, ...) SELECTcolumn1,column2,column3, ... FROMtable1 WHEREcondition; Demo Database In this tutorial we will use the well-known Northwind sample database. ...