Can you use an alias in a case statement?
The Case statement in SQL is mostly used in a case with equality expressions. The SQL Case statement is usually inside of a Select list to alter the output. Another way to do aliases is to put the name of the alias first followed by equals SQL Case on “MaritalStatus” as in the example above.
How do you give an alias name to a case in SQL?
- If you write only equal condition just: Select Case columns1 When 0 then ‘Value1’ when 1 then ‘Value2’ else ‘Unknown’ End.
- If you want to write greater , Less then or equal you must do like this: Select Case When [ColumnsName] >0 then ‘value1’ When [ColumnsName]=0 Or [ColumnsName]<0 then ‘value2’ Else ‘Unkownvalue’ End.
What is alias name in Oracle?
Description. Oracle ALIASES can be used to create a temporary name for columns or tables. COLUMN ALIASES are used to make column headings in your result set easier to read.
Can we use select statement in case Oracle?
Introduction to Oracle CASE expression You can use a CASE expression in any statement or clause that accepts a valid expression. For example, you can use the CASE expression in statements such as SELECT , UPDATE , or DELETE , and in clauses like SELECT , WHERE , HAVING , and ORDDER BY .
Can we use alias name in where clause in SQL Server?
Table aliases can be used in SELECT lists and in the FROM clause to show the complete record or selective columns from a table. Table aliases can be used in WHERE, GROUP BY, HAVING, and ORDER BY clauses.
Can we use case in where clause in SQL Server?
CASE STATEMENT IN WHERE CLAUSE: The CASE statement returns the value based on condition. We can use a case statement in Where, Order by and Group by clause. So, by using a CASE statement with the where condition displays the result.
Which is used to create an alias name in Rdbms?
Aliases are often used to make column names more readable. An alias only exists for the duration of that query. An alias is created with the AS keyword.
Which is used to create an alias name?
Notes. The keyword PUBLIC is used to create a public alias (also known as a public synonym). If the keyword PUBLIC is not used, the type of alias is a private alias (also known as a private synonym). Public aliases can be used only in SQL statements and with the LOAD utility.
How is an alias to a argument created in the declare section Mcq?
Explanation: To declare an alias, the keyword ALIAS is used. Then, the colon sign followed by the name of ALIAS. Then, the name of the object is then specified whose alias is to be created.
Can we write subquery in CASE statement?
Case Statement and Subquery Example This example use the Subquery inside a Case Statement in SQL Server. First, the Subquery will execute and finds the Average of the Sales amount. Same as IF ELSE statement.
Can I use CASE statement in where clause?
CASE can be used in any statement or clause that allows a valid expression. For example, you can use CASE in statements such as SELECT, UPDATE, DELETE and SET, and in clauses such as select_list, IN, WHERE, ORDER BY, and HAVING.
What is Oracle alias?
Oracle / PLSQL: ALIASES. This Oracle tutorial explains how to use Oracle ALIASES (temporary names for columns or tables) with syntax and examples. Oracle ALIASES can be used to create a temporary name for columns or tables. COLUMN ALIASES are used to make column headings in your result set easier to read.
What is case in Oracle SQL?
Oracle / PLSQL: CASE Statement Description. The Oracle/PLSQL CASE statement has the functionality of an IF-THEN-ELSE statement. Syntax. CASE [ expression ] WHEN condition_1 THEN result_1 WHEN condition_2 THEN result_2 … Returns. The CASE statement returns any datatype such as a string, numeric, date, etc. Note. Applies To Example. Frequently Asked Questions.
What is an alias in SQL?
An alias is a feature of SQL that is supported by most, if not all, relational database management systems (RDBMSs).
What is SQL CASE?
SQL 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). CASE Syntax Demo Database SQL CASE Examples. The following SQL will order the customers by City.