'Sailors s2' diaporamas de présentation

SQL: Queries, Programming, Triggers

SQL: Queries, Programming, Triggers. Chapter 5. We now introduce SQL, the standard query language for relational DBS. Like relational algebra, an SQL query takes one or two input tables and returns one output table. Any RA query can also be formulated in SQL.

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SQL: Queries, Programming, Triggers

SQL: Queries, Programming, Triggers. Chapter 5. Example Schema. We will use these table definitions in our examples. Sailors ( sid : integer , sname : string , rating : integer , age : real ) Boats ( bid : integer , bname : string , color : string )

789 views • 65 slides

Overview of Query Evaluation

518 views • 34 slides

SQL Queries and Subqueries

SQL Queries and Subqueries. Zaki Malik September 04, 2008. Basic SQL Query. SELECT [DISTINCT] target-list FROM relation-list WHERE qualification; Relation-list: A list of relation names (possibly with range-variable after each name).

600 views • 34 slides