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Jan 23, 2024
Merged

Adding unsupported commands #220

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Adding unsupported commands
Jan 23, 2024
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add supported SQL commands
Jan 23, 2024
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23 changes: 18 additions & 5 deletions 040-SDK/135-sql-access.mdx
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Expand Up @@ -222,15 +222,28 @@ WHERE people.id=emails.id;

By assigning aliases, you can distinguish between columns with similar names and manage them effectively.

### Unsupported commands
### Supported commands

Certain commands are not supported in Xata:
Xata supports the following essential Data Manipulation Language (DML) SQL commands, which are fundamental for managing and manipulating data within database tables:

- Data definition language (DDL) commands such as `CREATE`, `DROP`, `ALTER` and `TRUNCATE` are not supported.
- `SELECT`: This command is used to retrieve data from a database. It allows you to select one or more columns of a table, with various options for filtering, sorting, and grouping the data.

- Data control language (DCL) commands such as `GRANT` and `REVOKE` are not supported.
- `INSERT`: This command is used to add new records (rows) to a table. It specifies the table to insert into and the values for the new row.

- Transaction control language (TCL) commands such as `COMMIT`, `ROLLBACK`, `SAVEPOINT`, `ROLLBACK TO SAVEPOINT`, and `SET TRANSACTION` are not supported.
- `DELETE`: This command removes existing records from a table. It can be used with conditions to specify which records should be deleted.

- `UPDATE`: This command modifies existing records in a table such as correcting errors or updating information. Like DELETE, it can be used with conditions to specify which records should be updated and how.

#### Unsupported commands

The following table provides examples of commands that are currently **not supported** in Xata:

| Command type | Description | Unsupported commands |
| -------------------------------------- | ------------------------------------------------------- | ----------------------------------------------------------------------------- |
| **Data Definition Language (DDL)** | Used for defining or altering database structures | `CREATE`, `DROP`, `ALTER`, `TRUNCATE` |
| **Data Manipulation Language (DML)** | Typically used for data manipulation | `UPSERT`, `SEQUENCE` |
| **Data Control Language (DCL)** | Manages user permissions and access control | `GRANT`, `REVOKE` |
| **Transaction Control Language (TCL)** | Crucial for managing the state of database transactions | `COMMIT`, `ROLLBACK`, `SAVEPOINT`, `ROLLBACK TO SAVEPOINT`, `SET TRANSACTION` |

### Connection methods

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