October 2002
Beginner
864 pages
18h 41m
English
Content preview from Sams Teach Yourself SQL in 21 Days, Fourth Edition
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Day 7. Embedding Subqueries into Queries
A subquery is a query whose results are passed as the argument for another query. Subqueries enable you to bind several queries together. By the end of the day, you will understand and be able to do the following:
Build a subquery
Use the keywords EXISTS, ANY, and ALL with your subqueries
Build and use correlated subqueries
Today we will be working with the PART and ORDERS tables. To ensure that you have these tables created and that data has been inserted into them, please do the following in your MySQL database. The database bob in the example below should be substituted with the name of the database you created and have been putting into your tables:
mysql> use bob; Database changed mysql> show tables; ...
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