How to set Tutorial Mode in database345

Tutorial mode is a feature in database systems that allows users to practice SQL commands without making permanent changes to the database. This can be useful for learning SQL or for testing out new queries before executing them on live data. In this article, we will show you how to set tutorial mode in different database systems.

MySQL

To set tutorial mode in MySQL, you can use the `SET SQL_SAFE_UPDATES=0` command. This will turn off safe updates, which means that any changes you make to the database will not be permanent. You can then use the `SET SQL_SAFE_UPDATES=1` command to turn safe updates back on.
mysql> SET SQL_SAFE_UPDATES=0;
mysql> -- Make changes to the database
mysql> SET SQL_SAFE_UPDATES=1;

PostgreSQL

To set tutorial mode in PostgreSQL, you can use the `SET session_readonly=on` command. This will set the session to read-only mode, which means that any changes you make to the database will not be permanent. You can then use the `SET session_readonly=off` command to turn read-only mode off.
postgres> SET session_readonly=on;
postgres> -- Make changes to the database
postgres> SET session_readonly=off;

Oracle

To set tutorial mode in Oracle, you can use the `SET TRANSACTION ISOLATION LEVEL READ ONLY` command. This will set the transaction isolation level to read only, which means that any changes you make to the database will not be permanent. You can then use the `SET TRANSACTION ISOLATION LEVEL READ WRITE` command to turn read only mode off.
SQL> SET TRANSACTION ISOLATION LEVEL READ ONLY;
SQL> -- Make changes to the database
SQL> SET TRANSACTION ISOLATION LEVEL READ WRITE;

SQL Server

To set tutorial mode in SQL Server, you can use the `SET XACT_ABORT ON` command. This will turn on abort on error, which means that any errors that occur during a transaction will cause the transaction to be rolled back. You can then use the `SET XACT_ABORT OFF` command to turn abort on error off.
SQL> SET XACT_ABORT ON;
SQL> -- Make changes to the database
SQL> SET XACT_ABORT OFF;

Summary

Tutorial mode is a useful feature in database systems that allows users to practice SQL commands without making permanent changes to the database. This can be useful for learning SQL or for testing out new queries before executing them on live data. In this article, we have shown you how to set tutorial mode in different database systems.

2025-02-21

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