Commit, Rollback, and Savepoint in MySQL

sql-queries-4/README.md

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+

sql-queries-4/commit-rollback-savepoint/commit-and-chain.sql

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+START TRANSACTION; -- Start a new transaction
+//SQL Statements
+COMMIT AND CHAIN; -- Commit and chain a transaction
+SET TRANSACTION ISOLATION LEVEL READ COMMITTED; -- This statement generates an error message

sql-queries-4/commit-rollback-savepoint/commit-release.sql

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+START TRANSACTION; -- Start a transaction
+//SQL statements
+COMMIT RELEASE; -- Commit transaction and disconnect user session
+SELECT 1; -- Starts a new user session

sql-queries-4/commit-rollback-savepoint/commit.sql

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+START TRANSACTION; -- Start a transaction
+
+/* Add some data to the Department table */
+INSERT 
+INTO Department 
+VALUES(6,'Data Science','DS');
+INSERT 
+INTO Department 
+VALUES(7,'Electrical Engineering','EE');
+
+COMMIT; -- Commit the transaction

sql-queries-4/commit-rollback-savepoint/implicit-commit.sql

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+START TRANSACTION; -- Start a new transaction
+
+/* Add some data to the Department table */ 
+INSERT 
+INTO Department 
+VALUES(6,'Data Science','DS');
+
+/* Delete the new data from the Department table */ 
+DELETE 
+FROM Department
+WHERE id > 5;
+
+CREATE TABLE t(i INTEGER); -- This statement causes an implicit commit
+ROLLBACK; -- This statement has no effect

sql-queries-4/commit-rollback-savepoint/rollback-transaction.sql

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+START TRANSACTION; -- Start a transaction
+
+/* Delete Data from  Department */
+DELETE 
+FROM Department;
+
+ROLLBACK; -- Rollback the transaction

sql-queries-4/commit-rollback-savepoint/savepoint.sql

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+START TRANSACTION; -- Start a new transaction
+
+ /* Add data to Department table */ 
+INSERT 
+INTO Department 
+VALUES(6,'Data Science','DS');
+
+SAVEPOINT sp1; -- Create a savepoint
+
+ /* Delete a row of data from the Department table */ 
+DELETE 
+FROM Department 
+WHERE id=6;
+
+ROLLBACK TO SAVEPOINT sp1; -- Rollback transaction to the savepoint
+
+RELEASE SAVEPOINT sp1; -- Release the savepoint