How do you return a blank row in SQL?

How do you return a blank row in SQL?

Suggest to check for return row from sql query, if zero, create a datatable dynamically with the columns identical to the expected return columns of the sql query ,i.e. id, description, price, then add a row with the data that you decide, i.e. 0, ‘no record’, 0. Then bind it to the gridview.

How do I know if MySQL query has nothing returned?

SELECT * FROM yourTableName WHERE yourSpecificColumnName IS NULL OR yourSpecificColumnName = ‘ ‘; The IS NULL constraint can be used whenever the column is empty and the symbol ( ‘ ‘) is used when there is empty value.

How do I check if a field is NULL in SQL?

How to Test for NULL Values?

1. SELECT column_names. FROM table_name. WHERE column_name IS NULL;
2. SELECT column_names. FROM table_name. WHERE column_name IS NOT NULL;
3. Example. SELECT CustomerName, ContactName, Address. FROM Customers. WHERE Address IS NULL;
4. Example. SELECT CustomerName, ContactName, Address. FROM Customers.

How to add an empty row to a SQL query?

The obvious way to achieve this is create a temp table, put the results into it, test for any rows in the temp table and either return the results from the temp table or the single empty result. Another way might be to do an EXISTS against the same where clause that’s in the main query before the main query is executed.

How to return empty row if no record is found?

Then bind it to the gridview. This solution will take care of any zero row situation and is reusable. hi there, i did tried the datatable’s method. As stated at the question above, im facing an error. i already assign the sqldatasource to the gridview at HTML, then code behind i assign the DataTable to the gridview again. any solution for this?

How to check for return row from SQL query?

Suggest to check for return row from sql query, if zero, create a datatable dynamically with the columns identical to the expected return columns of the sql query ,i.e. id, description, price, then add a row with the data that you decide, i.e. 0, ‘no record’, 0.

When to return a null value in PostgreSQL?

If a row is found in the first SELECT, it is returned. Postgres stops looking for more rows, as soon as the first is found due to LIMIT 1 ( FETCH FIRST 1 ROW ONLY ). The second SELECT is only even executed if the first returns nothing. The data type of the NULL value is determined by the data type of tbl.id automatically.