Order Dropdown Statement Of Work For Free

The order statement generates a 'virtual field' that contains NULL or 0 based on the case condition. The ORDER BY is applied based on that virtual field. The zero value in the order by precedes the NULL value. That's all, it's a way to set NULLs of the field1 at the end of the order list.

The ORDER BY command is used to sort the result set in ascending or descending order. The ORDER BY command sorts the result set in ascending order by default. To sort the records in descending order, use the DESC keyword.

Sort by ordinal positions of columns But instead of specifying the column names explicitly, it uses the ordinal positions of the columns: SELECT first_name, last_name FROM sales. customers ORDER BY 1, 2; In this example, 1 means the first_name column and 2 means the last_name column.

This is always true Condition i.e. '0' will always be equal to '0'. Which means your condition will always be executed. Some people use this for ease in debugging of a query. They will put it in where clause and rest conditions with AND clause so that for checking purpose they can comment the unnecessary condition.

It simply means sorting the view or table by 1st column of the query's result. above this query, the 'employee_id' column is the first column but this column is selected from two tables that's why to use this type of sorting.

A SELECT statement retrieves zero or more rows from one or more database tables or database views. In most applications, SELECT is the most commonly used data manipulation language (DML) command. As SQL is a declarative programming language, SELECT queries specify a result set, but do not specify how to calculate it.

It simply means sorting the view or table by 1st column of the query's result. above this query, the 'employee_id' column is the first column but this column is selected from two tables that's why to use this type of sorting.