使用 MySQL 中的 INSERT INTO SELECT 和 UNION 來執行多個插入操作

要執行多個插入操作，語法如下 −

insert into yourTableName(yourColumnName1,yourColumnName2,yourColumnName3,..N)
   select yourValue1 as yourColumnName1,yourValue2 as yourColumnName2,yourValue3 as yourColumnName3,......N
   union
   select yourValue1 as yourColumnName1,yourValue2 as yourColumnName2,yourValue3 as yourColumnName3,......N
.
.
N

為了理解以上語法，我們建立一個表 −

mysql> create table DemoTable1936
   (
   StudentId int,
   StudentName varchar(20),
   StudentCountryName varchar(20)
   );
Query OK, 0 rows affected (0.00 sec)

使用插入命令在表中插入一些記錄 −

mysql> insert into DemoTable1936(StudentId,StudentName,StudentCountryName)
   select 1001 as StudentId,'Chris' as StudentName,'US' as StudentCountryName
   union
   select 1002 as StudentId,'Robert' as StudentName,'UK' as StudentCountryName
   union
   select 1003 as StudentId,'David' as StudentName,'AUS' as StudentCountryName;
Query OK, 3 rows affected (0.00 sec)
Records: 3  Duplicates: 0  Warnings: 0

使用 select 語句從表中顯示所有記錄 −

mysql> select * from DemoTable1936;

這將產生以下輸出 −

+-----------+-------------+--------------------+
| StudentId | StudentName | StudentCountryName |
+-----------+-------------+--------------------+
|      1001 | Chris       |               US   |
|      1002 | Robert      |               UK   |
|      1003 | David       |              AUS   |
+-----------+-------------+--------------------+
3 rows in set (0.00 sec)

更新於:30-12-2019

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