Transactions
In database management, a transaction is a sequence of database operations that are executed as a single unit of work. Transactions ensure data consistency and integrity by allowing multiple operations to be treated as a single, indivisible operation.
The ACID properties (Atomicity, Consistency, Isolation, Durability) define the characteristics of a transaction and ensure that it is executed reliably.
Example
Let's consider an example where we have a database table 'Orders' with a column 'Quantity' representing the quantity of a product ordered by a customer.
We want to update the 'Quantity' column to increase the quantity by 1 for all orders. We can perform this operation within a transaction to ensure data consistency.
TEXT/X-SQL
1-- Begin the transaction
2START TRANSACTION;
3
4-- Update the 'Quantity' column
5UPDATE Orders SET Quantity = Quantity + 1;
6
7-- Commit the transaction
8COMMIT;xxxxxxxxxx32
COMMIT;// Transactions// In database management, a transaction is a sequence// of database operations that are executed as a single// unit of work. Transactions ensure data consistency and// integrity by allowing multiple operations to be// treated as a single, indivisible operation.// The ACID properties (Atomicity, Consistency,// Isolation, Durability) define the characteristics// of a transaction and ensure that it is executed// reliably.// Example// Let's consider an example where we have a database// table 'Orders' with a column 'Quantity' representing// the quantity of a product ordered by a customer.// We want to update the 'Quantity' column to// increase the quantity by 1 for all orders.// We can perform this operation within a transaction// to ensure data consistency.// Begin the transactionSTART TRANSACTION;// Update the 'Quantity' columnUPDATE Orders SET Quantity = Quantity + 1;OUTPUT
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