如何在 MySQL 中导出特定列数据?
要导出 MySQL 中的特定列数据,请使用 OUTFILE −
select yourColumnName from yourTableName into outfile 'yourLocationOfFile’;
让我们首先创建一个表 −
mysql> create table DemoTable ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentFirstName varchar(20), StudentLastName varchar(20) ); Query OK, 0 rows affected (0.54 sec)
使用 insert 命令向表中插入记录 −
mysql> insert into DemoTable(StudentFirstName,StudentLastName) values('John','Doe'); Query OK, 1 row affected (0.26 sec) mysql> insert into DemoTable(StudentFirstName,StudentLastName) values('David','Miller'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable(StudentFirstName,StudentLastName) values('John','Smith'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable(StudentFirstName,StudentLastName) values('Carol','Taylor'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable(StudentFirstName,StudentLastName) values('Sam','Williams'); Query OK, 1 row affected (0.18 sec)
使用 select 命令从表中显示记录 −
mysql> select *from DemoTable;
这将产生以下输出 −
+-----------+------------------+-----------------+ | StudentId | StudentFirstName | StudentLastName | +-----------+------------------+-----------------+ | 1 | John | Doe | | 2 | David | Miller | | 3 | John | Smith | | 4 | Carol | Taylor | | 5 | Sam | Williams | +-----------+------------------+-----------------+ 5 rows in set (0.00 sec)
以下是用于导出 MySQL 中特定列数据的查询 −
mysql> select StudentLastName from DemoTable into outfile 'E:\StudentLastName.txt'; Query OK, 5 rows affected (0.00 sec)
文件位置为“E:\StudentLastName.txt”。文件及其内容的屏幕截图如下。我们已成功将列数据导出到该文件 −
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