docs/versioned_docs/version-3.0.0/sql-reference/transactions.md

---
title: Transactions
sidebar_label: Transactions
---

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A transaction is a sequence of SQL operations that starts with the `START TRANSACTION` statement and ends with the `COMMIT` statement. Either the effect of all operations will be published, or no results will be published at all.

:::warning
Transaction control statements are only allowed within a [script](../developers-guide/sql/sql-api.md#sql-scripts).
:::

In Apache Ignite 3, you start the transaction by using the `START TRANSACTION` statement:

{/* Railroad diagram omitted - see 3.1.0 docs */}

:::note
DDL statements are not supported inside transactions.
:::

Parameters:

- `READ WRITE` - both read and write operations are allowed in the transaction. Used by default.
- `READ ONLY` - only read operations are allowed in the transaction.

You close and commit the transaction by using the `COMMIT` statement:

{/* Railroad diagram omitted - see 3.1.0 docs */}

## Example

The example below inserts 3 lines into the table in a single transaction, ensuring they will all be committed together:

```sql
START TRANSACTION READ WRITE;

INSERT INTO Person (id, name, surname) VALUES (1, 'John', 'Smith');
INSERT INTO Person (id, name, surname) VALUES (2, 'Jane', 'Smith');
INSERT INTO Person (id, name, surname) VALUES (3, 'Adam', 'Mason');

COMMIT;
```