Database query

Sixth Chapter Lesson-4: Database queries, Query Languages and Different operators.

At the end of this lesson- 1. You will be able to explain different database queries. 2. You will be able to explain different query languages. 2. You will be able to explain different database operators.   Query: A query is a request for data or information from a database table or combination of tables. Types of query: 1.Select Query 2.Parameter Query 3.Crosstab Query 4.Action Query Select Query: Select query is used to retrieve data from a table by selecting fields. It is the mostly used SQL query. Parameter Query: A parameter query is one of the...
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