The clause excludes your immediate heirs.

A SQL2 check constraint is a search condition, like the search condition in a WHERE clause, that produces a true/false value.

Accommodating prefix/suffix sizes of more than a single row requires the HAVING clause to be reworked.

Action: Reissue the command, specifying a valid ALTER OUTLINE clause.

All the calculations thus far were performed on all the data in a table or on data that matched a specific WHERE clause.

For each clause and for each variable, we construct a "gadget," suggested in Fig. 10.9.

However, if you leave off the OVERFLOW clause: .. it does.

Instead, the ANSI/ISO SQL standard considers two NULL values to be equal for purposes of the GROUP BY clause.

In such situations, you have to filter using the HAVING clause, because only the HAVING clause can “see” summarized values.

It uses a self-join to compare the work table with itself, then removes duplicates from the result set via a GROUP BY clause.