Business Studies, asked by divij8544, 11 months ago

How Can Queries Be Combined And What Is The Use?

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Answered by Anonymous

0

Answer:

To combine result set of two or more queries using the UNION operator, there are the basic rules that you must follow:

First, the number and the orders of columns that appear in all SELECT statements must be the same.

Second, the data types of columns must be the same or convertible.

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