如何在 MySQL 中导出特定列数据?
mysqlmysqli database
要在 MySQL 中导出特定列数据，请使用 OUTFILE −
select yourColumnName from yourTableName into outfile 'yourLocationOfFile’;
首先我们创建一个表 −
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 命令在表中插入记录 −
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 命令显示表中的记录 −
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)
以下是在 MySQL 中导出特定列数据的查询−
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’。文件和内容的截图如下。我们已成功将列数据导出到文件 −
