Can you use CASE in WHERE clause SQL?
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.
Can we use in in WHERE clause?
The SQL IN condition (sometimes called the IN operator) allows you to easily test if an expression matches any value in a list of values. It is used to help reduce the need for multiple OR conditions in a SELECT, INSERT, UPDATE, or DELETE statement.
Can we use case statement in on clause?
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. It can be used in the Insert statement as well.
Can I use CASE in WHERE clause 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 .
What is the difference between WHERE and having SQL clauses?
A HAVING clause is like a WHERE clause, but applies only to groups as a whole (that is, to the rows in the result set representing groups), whereas the WHERE clause applies to individual rows. A query can contain both a WHERE clause and a HAVING clause.
Which is a CASE WHERE the SQL Server trigger on the table is fired and perform an action?
DML triggers in SQL Server are fired when a DML event occurs. i.e. when data is inserted/ updated/deleted in the table by a user.
What is the use of WHERE clause in SQL?
The SQL WHERE Clause The WHERE clause is used to filter records. It is used to extract only those records that fulfill a specified condition.
What is the IN clause in SQL?
The IN command allows you to specify multiple values in a WHERE clause. The IN operator is a shorthand for multiple OR conditions.
Can you use or in SQL?
The OR condition can be used in the SQL UPDATE statement to test for multiple conditions. This example would update all favorite_website values in the customers table to techonthenet.com where the customer_id is 5000 or the last_name is Reynolds or the first_name is Paige.
How to write case statement in where clause?
If employee statecode is AR,then update to FL
Can I use a ‘case’ statement in a ‘where’ clause?
You can use a CASE Statement anywhere a valid expression is used within the SELECT statement such as the WHERE clause’s filter criteria. Suppose we want to get all people from the Persons table whose persontype is either VC or IN. To do this with CASE you could write: The idea here is to test PersonType for either VC or IN.
How do I use where clause in the SQL trigger?
AFTER INSERT activated after data is inserted into the table.
Can I have a case statement in the where clause?
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.