# Data Definition (DDL)

<CardGroup cols={2}>
  <Card title="Datatypes" href="/sql/data-definition-ddl/datatypes-and-fixed-encoding" />

  <Card title="Users and Databases" href="/sql/data-definition-ddl/users-and-databases" />

  <Card title="Tables" href="/sql/data-definition-ddl/tables" />

  <Card title="System Tables" href="/sql/data-definition-ddl/system-tables" />

  <Card title="Views" href="/sql/data-definition-ddl/views" />

  <Card title="Policies" href="/sql/data-definition-ddl/policies" />

  <Card title="Comment" href="/sql/data-definition-ddl/comment" />
</CardGroup>