docs/sql-manual/sql-reference/Data-Definition-Statements/Create/CREATE-INDEX.md

---
{
    "title": "CREATE-INDEX",
    "language": "en"
}
---

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## CREATE-INDEX

### Name

CREATE INDEX

### Description

This statement is used to create an index
grammar:

```sql
CREATE INDEX [IF NOT EXISTS] index_name ON table_name (column [, ...],) [USING BITMAP] [COMMENT 'balabala'];
````
Notice:
- Currently only supports bitmap indexes
- BITMAP indexes are only created on a single column

### Example

1. Create a bitmap index for siteid on table1

    ```sql
    CREATE INDEX [IF NOT EXISTS] index_name ON table1 (siteid) USING BITMAP COMMENT 'balabala';
    ````


### Keywords

````text
CREATE, INDEX
````

### Best Practice