Best answer: How does order by clause work in SQL?

The ORDER BY clause orders or sorts the result of a query according to the values in one or more specific columns. More than one columns can be ordered one within another. It depends on the user that, whether to order them in ascending or descending order. The default order is ascending.

How does ORDER BY work in SQL?

The ORDER BY statement in sql is used to sort the fetched data in either ascending or descending according to one or more columns.

  1. By default ORDER BY sorts the data in ascending order.
  2. We can use the keyword DESC to sort the data in descending order and the keyword ASC to sort in ascending order.

What is the meaning of ORDER BY clause in SQL?

An ORDER BY clause in SQL specifies that a SQL SELECT statement returns a result set with the rows being sorted by the values of one or more columns. … ORDER BY is the only way to sort the rows in the result set. Without this clause, the relational database system may return the rows in any order.

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What is the use of ORDER BY clause with an example?

In previous examples, we specified the column name in Order by clause to sort results in ascending or descending order. We can also specify column position in Order by clause. In this query, column birthdate is at the 3rd position; therefore, we can use three in the Order by clause to sort results on this column data.

How do you use variables in ORDER BY clause in SQL?

How to use variable in ORDER BY clause in sql server

  1. Let us assume we have created a table and inserted some data into using following sql query:
  2. CREATE TABLE tblSource(
  3. ID INT IDENTITY PRIMARY KEY,
  4. vcData VARCHAR(500)
  5. )
  6. INSERT INTO tblSource VALUES(‘PC’),(‘Laptop’),(‘Mobile’)
  7. DECLARE @Col_Name VARCHAR(128) = ‘ID’

How do I get alphabetical order in SQL?

By default, ORDER BY without any additional specifier sorts in ascending order (equivalent to using the ASC keyword explicitly). As you can probably guess, ASC stands for “ascending.” If you’d like to sort in descending order, simplify specify the DESC keyword after the column name.

How do I show alphabetical order in SQL?

If you want to sort based on two columns, separate them by commas. For example, ORDER BY LAST_NAME ASC, FIRST_NAME DESC; would display results sorted alphabetically by last name. If the same LAST_NAME matches multiple FIRST_NAME entries, the results of FIRST_NAME will also display in descending order.

What is order command?

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.

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What is the correct order of query operators in a SQL query?

Six Operations to Order: SELECT, FROM, WHERE, GROUP BY, HAVING, and ORDER BY. By using examples, we will explain the execution order of the six most common operations or pieces in an SQL query. Because the database executes query components in a specific order, it’s helpful for the developer to know this order.

What is the difference between having and where clause?

1. WHERE Clause is used to filter the records from the table based on the specified condition. HAVING Clause is used to filter record from the groups based on the specified condition.

Can we use WHERE clause after order by?

Yes it does. The logical order in which a query is evaluated is: FROM / JOIN clause. WHERE clause.

Which one is correct syntax for WHERE clause?

The basic syntax for the WHERE clause when used in a MySQL SELECT WHERE statement is as follows. “WHERE” is the keyword that restricts our select query result set and “condition” is the filter to be applied on the results.

Can we use order by without WHERE?

You can use the WHERE clause with or without the ORDER BY statement. You can filter records by finite values, comparison values or with sub-SELECT statements. The WHERE clause gives you several options when filtering data.

Which SQL keyword is used to retrieve a maximum value?

MAX() is the SQL keyword is used to retrieve the maximum value in the selected column.

How do you order two things in SQL?

After the ORDER BY keyword, add the name of the column by which you’d like to sort records first (in our example, salary). Then, after a comma, add the second column (in our example, last_name ). You can modify the sorting order (ascending or descending) separately for each column.

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