Using the ‘Comment On’ capabilities of Netezza is an easy way to provide self-documentation within the DDL structure of a table. This can be very helpful to developers and users, who can see the DDL of the table. Personally, I think of it as a way to document the purpose and/or business meaning of a table. This can be especially, when differing team may be working with tables. Also, reduce the reliance on developer and/or user memory, or to search of the technical documentation, which may or may not be readily available.
Basic ‘COMMENT ON Table’ Syntax
The basic syntax to add a comment to add a comment to a table is:
COMMENT ON TABLE <<Schema.TableName>> IS ‘<<Descriptive Comment>>’;
Example ‘COMMENT ON Table’ Syntax
COMMENT ON TABLEdate_dim IS ‘Date dimension table, which provides basic calendar date information’;
- PureData System for Analytics, PureData System for Analytics 7.2.1, IBM Netezza database user documentation, Netezza SQL command reference, Comment On Command
- PureData System for Analytics, PureData System for Analytics 7.2.1, IBM Netezza database user documentation, Netezza SQL command reference