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This article mainly introduces mysql database migration and script development. I hope I can add and update some knowledge to you. If you have any other questions you need to know, you can continue to follow my updated articles in industry information.

The company's new platform is online, and some original user data in the old database need to be migrated to the new platform. This script is specially developed to ensure data integrity and efficiency #! / bin/bash## to the table echo needed in the old database. "Please prepare three files under the scripting language directory, one is tables.txt, which lists the table names that need to be exported from the old database. The other is the user account password and database of the old oldmysqlauth database, and the third is the user account password and database of the new newmysqlauth database, which are listed in the format: 1, 2, 3. "counts= `awk 'BEGIN {twee0 } {tweezers;} END {print t;} 'tables.txt`i = 1mkdir sql if [- e tables.txt] & & [- e oldmysqlauth] & & [- e newmysqlauth]; then while [$I-le $counts]; do table= `awk-v awk_i= "$I"' NR==awk_i {print} 'tables.txt` / usr/bin/mysqldump-u`awk 'NR==1 {print}' oldmysqlauth`-p`awk 'NR==2 {print}' oldmysqlauth``oldmysqlauth``oldmysqlauth` NR==3 {print} 'oldmysqlauth` $table > sql/$table.sql iComple1) done else echo "the program needs incomplete files. Please check that" fiecho "has exported the tables you need from the old database. Data table restore is about to take place "# Import tables exported from the old database into the new database k=1if [- e tables.txt] & & [- e oldmysqlauth] & & [- e newmysqlauth] Thenwhile [$k-le $counts]; do table= `awk-v awk_k= "$k" NR==awk_k {print} 'tables.txt`; / usr/bin/mysql-u`awk' NR==1 {print} 'newmysqlauth`-p`awk' NR==2 {print} 'newmysqlauth` awk' NR==3 {print} 'newmysqlauth` < / root/datapopulate/sql/$table.sql kali$ ((kud1)) done else echo "the program needs incomplete files, please check"

Echo "has migrated the tables from the old database to the new database, thank you for using it!"

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