This illustration shows the following syntax on a horizontal line:

- `EXEC SQL`

- `AT` db_name (on a loop)

- `FOR` :host_integer (on a loop)

- :host_variable (on a loop)

- `UPDATE`

- `TABLE` (on a loop)

- schema (on a loop)

- view (on a loop)

- @dblink (on a loop)

- alias (on a loop)

- `SET` ( column ) - ( subquery_1 )

- column = expr (on a loop)

- ( subquery_2 ) (on a loop)

- `WHERE` condition (on a loop)

- `CURRENT OF` cursor (on a loop)