How can we export data to a CSV file whose filename name contains timestamp at which the file is created?

Sometimes we need to export data into a CSV file whose name has a timestamp at which that file is created. It can be done with the help of MySQL prepared statement. To illustrate it we are using the following example −

Example

The queries in the following example will export the data from table ‘student_info’ to the CSV file having a timestamp in its name.

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)

The above query will create CSV file name ‘student_2017_12_10_18_52_46.CSV’ i.e. a CSV file with timestamp value, having the following data −

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