Long Table Data [duplicate]

1. How do you avoid duplicates in a table?
2. How can I get duplicate data from a table?
3. Can a table contain duplicate records?

How do you avoid duplicates in a table?

In the Navigation Pane, right-click the table that contains the field, and then click Design View. Select the field that you want to make sure has unique values. In the Field Properties pane at the bottom of the table design view, on the General tab, set the Indexed property to Yes (No duplicates).

How can I get duplicate data from a table?

Using the GROUP BY and HAVING clauses we can show the duplicates in table data. The GROUP BY statement in SQL is used to arrange identical data into groups with the help of some functions. i.e if a particular column has the same values in different rows then it will arrange these rows in a group.

Can a table contain duplicate records?

When you create a table, you can specify the handling of duplicate rows. By default, duplicate rows are allowed. If you disallow them, an error is generated when a user attempts to insert a duplicate row into a table.