Can I read Understanding SQL Set Operators on EtoBox?
Understanding SQL Set Operators by mohsin dish is a document available to read on EtoBox.
What is Understanding SQL Set Operators about?
Set operators allow combining the results of multiple queries. The main set operators are: 1) UNION combines results and removes duplicates. UNION ALL includes all duplicates. 2) INTERSECT returns rows that are selected by both queries. 3) MINUS returns rows selected by the first query that are not in the second query. Queries using set operators are called compound queries. Examples demonstrate combining results from different tables using UNION, UNION ALL, INTERSECT and MINUS.
- Author
- mohsin dish
- Language
- EN