# ColumnStore Data Definition Statements

- [ColumnStore ALTER TABLE](https://mariadb.com/docs/analytics/mariadb-columnstore/reference/data-definition-statements/columnstore-alter-table.md): ALTER TABLE for MariaDB ColumnStore modifies existing tables: add, drop, or rename columns and rename tables, with ColumnStore-specific syntax notes for the columnar engine.
- [ColumnStore ALTER VIEW](https://mariadb.com/docs/analytics/mariadb-columnstore/reference/data-definition-statements/columnstore-alter-view.md): ALTER VIEW for MariaDB ColumnStore changes the definition of an existing view; CREATE OR REPLACE VIEW serves the same purpose with the same syntax.
- [ColumnStore CREATE PROCEDURE](https://mariadb.com/docs/analytics/mariadb-columnstore/reference/data-definition-statements/columnstore-create-procedure.md): CREATE PROCEDURE for MariaDB ColumnStore defines a stored procedure with named IN, OUT, and INOUT parameters and a routine body containing SQL statements.
- [ColumnStore CREATE TABLE](https://mariadb.com/docs/analytics/mariadb-columnstore/reference/data-definition-statements/columnstore-create-table.md): CREATE TABLE syntax for MariaDB ColumnStore: defines tables with ENGINE=columnstore, optional compression COMMENT, and standard column-definition syntax for most MariaDB data types.
- [ColumnStore CREATE VIEW](https://mariadb.com/docs/analytics/mariadb-columnstore/reference/data-definition-statements/columnstore-create-view.md): CREATE VIEW for MariaDB ColumnStore defines a stored query that can be referenced as a virtual table; supports CREATE OR REPLACE VIEW for redefinition.
- [ColumnStore DROP TABLE](https://mariadb.com/docs/analytics/mariadb-columnstore/reference/data-definition-statements/columnstore-drop-table.md): DROP TABLE for MariaDB ColumnStore deletes a table from the database; the ColumnStore-specific RESTRICT clause limits the drop to the front end for sync purposes.
- [DDL Statements Different in ColumnStore](https://mariadb.com/docs/analytics/mariadb-columnstore/reference/data-definition-statements/ddl-statements-that-differ-for-columnstore.md): DDL statements that behave differently on MariaDB ColumnStore: DROP TABLE RESTRICT, RENAME TABLE cross-database limits, CREATE TABLE engine syntax, and CREATE INDEX restrictions.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://mariadb.com/docs/analytics/mariadb-columnstore/reference/data-definition-statements.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.