如何将数据导出到文件名包含文件创建时间戳的 CSV 文件？

有时我们需要将数据导出到 CSV 文件中，该文件的名称带有创建该文件的时间戳。这可以借助 MySQL 准备好的语句来完成。为了说明这一点，我们使用以下示例 -

示例

mysql> SET @time_stamp = DATE_FORMAT(NOW(),'_%Y_%m_%d_%H_%i_%s'); Query OK, 0 rows affected (0.00 sec) mysql> SET @FOLDER = 'C:/mysql/bin/mysql-files'; Query OK, 0 rows affected (0.00 sec) mysql> SET @FOLDER = 'C:/mysql/bin/mysql-files/'; Query OK, 0 rows affected (0.00 sec) mysql> SET @PREFIX = 'Student15'; Query OK, 0 rows affected (0.00 sec) mysql> SET @EXT = '.CSV'; Query OK, 0 rows affected (0.00 sec) mysql> SET @Command = CONCAT("SELECT * FROM Student_info INTO OUTFILE '",@FOLDER, @PREFIX, @time_stamp, @EXT,"' FIELDS ENCLOSED BY '"' TERMINATED BY ';' ESCAPED BY '"'"," LINES TERMINATED BY 'r';"); Query OK, 0 rows affected (0.00 sec) mysql> PREPARE stmt FROM @command; Query OK, 0 rows affected (0.00 sec) Statement prepared mysql> execute stmt; Query OK, 6 rows affected (0.07 sec)登录后复制

101;"YashPal";"Amritsar";"History" 105;"Gaurav";"Chandigarh";"Literature" 125;"Raman";"Shimla";"Computers" 130;"Ram";"Jhansi";"Computers" 132;"Shyam";"Chandigarh";"Economics" 133;"Mohan";"Delhi";"Computers"登录后复制