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Describe the six clauses in the syntax of an SQL.docx
1. Describe the six clauses in the syntax of an SQL
Complex Queries,Triggers, Views, and Schema Modification7.1. Describe the six clauses in
the syntax of an SQL retrieval query. Show what type of constructs can be specified in each
of the six clauses. Which of the six clauses are required and which are optional?7.2. Describe
conceptually how an SQL retrieval query will be executed by specifying the conceptual
order of executing each of the six clauses.7.3. Discuss how NULLs are treated in comparison
operators in SQL. How are NULLs treated when aggregate functions are applied in an SQL
query? How are NULLs treated if they exist in grouping attributes?7.4. Discuss how each of
the following constructs is used in SQL, and discuss the various options for each construct.
Specify what each construct is useful for.Nested queriesJoined tables and outer
joinsAggregate functions and groupingTriggersAssertions and how they differ from
triggersThe SQL WITH clauseSQL CASE constructViews and their up databilitySchema
change commands
