What is ORDER BY case in SQL?

What is ORDER BY case in SQL?

SQL order by case can be used when we have to order the data on a conditional basis and define the criteria on which the ordering will be done based on a certain condition. For this, the case statement can be used inside the order by clause.

How do you use ORDER BY in case statement?

The default behaviour of ORDER BY clause with NULLs is sorting them first. A column having NULLs, if sorted will display NULLs first then the sorted values. If we have a requirement to place NULLs at the end query result set then we can use CASE statement with ORDER BY clause.

What is the syntax of case statement?

The SQL CASE Statement The CASE statement goes through conditions and returns a value when the first condition is met (like an if-then-else statement). So, once a condition is true, it will stop reading and return the result. If no conditions are true, it returns the value in the ELSE clause.

What is the syntax of ORDER BY clause?

Syntax. SELECT column-list FROM table_name [WHERE condition] [ORDER BY column1, column2, .. columnN] [ASC | DESC]; You can use more than one column in the ORDER BY clause.

Is ORDER BY case sensitive?

Sorting on the basis of the ASCII values differentiates the uppercase letters from the lowercase letters, and results in a case-sensitive order.

What does ORDER BY 1 do in SQL?

SQL Server allows you to sort the result set based on the ordinal positions of columns that appear in the select list. In this example, 1 means the first_name column and 2 means the last_name column.

What is case statement in SQL?

The case statement in SQL returns a value on a specified condition. We can use a Case statement in select queries along with Where, Order By, and Group By clause. In Case statement, we defined conditions. Once a condition is satisfied, its corresponding value is returned.

How do you write a case statement in SQL Server?

SQL Server CASE statement syntax It starts with the CASE keyword followed by the WHEN keyword and then the CONDITION. The condition can be any valid SQL Server expression which returns a boolean value. For instance, the condition can be model > 2000, the THEN clause is used after the CONDITION.

How do I get 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 by 2 in SQL?

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.

How do you make a SQL query case insensitive?

Case insensitive SQL SELECT: Use upper or lower functions select * from users where lower(first_name) = ‘fred’; As you can see, the pattern is to make the field you’re searching into uppercase or lowercase, and then make your search string also be uppercase or lowercase to match the SQL function you’ve used.

What is the example of case sensitive?

Examples of computer-related data that is often, but not always, case sensitive include commands, usernames, file names, programming language tags, variables, and passwords. For example, because Windows passwords are case sensitive, the password HappyApple$ is only valid if it’s entered in that exact way.

What is a case statement in SQL?

The SQL Server case statement is a conditional statement that returns a single value based on the evaluation of a statement. Case statements can be used in a SELECT list, WHERE clause and even an ORDER BY clause.

What is a case in SQL?

CASE is the special scalar expression or conditional statement in the SQL language which returns a single value based on the evaluation of a statement. It can be used in Select, Where and Order By clause. A Case expression is mostly used in SQL stored procedures or as a formula for a particular column, which optimizes the SQL statements.

What is case sensitive in SQL?

The SQL Keywords are case-insensitive (SELECT, FROM, WHERE, etc), but are often written in all caps. However in some setups table and column names are case-sensitive. MySQL has a configuration option to enable/disable it.