Data Retrieval | MCQs

Explanation

Getting data from a cell located in a different sheet is called Cell reference.

There are Three types of Cell reference in Excel

1. Relative
2. Absolute
3. Mixed

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RY17-012-23

Explanation

The single equals sign = is used for comparison in SQL conditions.

The query correctly filters rows where the Job column matches the string 'Clerk'.

Explanation

The SELECT * syntax retrieves all columns from the specified table.

It is the standard SQL command for displaying complete table data.

Explanation

An index helps the database quickly locate rows in a table without scanning the entire data.

It improves query performance by providing direct pointers to the data rows.

Explanation

A dynaset is a collection of records that match the parameters of a query. 

It dynamically updates based on the query criteria set by the user.

Explanation

The QUERY can be used to select data from single and multiple tables.

Single Table Query:

When you want to retrieve data from a single table, you can use a simple SELECT statement.

Multiple Table Query:

To retrieve data from multiple tables, you use a JOIN clause. 

Explanation

In SQL, to retrieve data stored in our tables, we use the SELECT statement.

Explanation

If the database operations do not update the database but only retrieve data, this type of transaction is called a read-only transaction.

If the database were in an inconsistent state before a transaction, it would remain in the inconsistent state after the transaction.