Can you have duplicate column names in SQL?

Can you have duplicate column names in SQL?

To avoid this error, you should define the table when inserting the column name in the SQL statement. Example: We have table departments and dept_emp with the same column name dept_no . A view also can’t have two columns of the same name.

Can two columns have same name in SQL?

At times you may want to join two tables in SQL and there are in the tables, columns with the same name. In this case, if you join the two tables and run the query without differentiating the names of the columns that are the same, the error “Ambiguous name column” will glare at you.

Can SQL tables have columns with the same name?

You cannot create two columns with exactly the same name.

How do I duplicate a row in SQL?

To select duplicate values, you need to create groups of rows with the same values and then select the groups with counts greater than one. You can achieve that by using GROUP BY and a HAVING clause.

Can multiple columns in the view have same column name?

Assuming that in addition to having the same column names, columns of the same contain the same data, you want to create a view that is the union of all those tables. UNION is used to combine the result from multiple SELECT statements into a single result set.

Can a table have two fields with same name?

You can’t add two columns with the same name to a single table.

Can two table have the same column name?

Two tables can have exactly the same column names but if they are not connected in some other way then they have nothing to do with each other. Here is what normally happens when a table has a “foreign” key from another table.

Can different tables have the same column names?

Summary. “Using the same column name in different tables with different data-types” in an SQL database is simply “an accident waiting to happen.” It is easily avoided. Don’t do it and don’t do anything to encourage it.

How can we find duplicate records in a table?

One way to find duplicate records from the table is the GROUP BY statement. 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.