Can We Write Insert Statement In Function In Oracle?

Can we use select in insert statement?

You can use a select-statement within an INSERT statement to insert zero, one, or more rows into a table from the result table of the select-statement.

The select-statement embedded in the INSERT statement is no different from the select-statement you use to retrieve data..

Can we use subquery in case statement?

Msg 512, Level 16, State 1, Line 1 Subquery returned more than 1 value. This is not permitted when the subquery follows =, != , <, <= , >, >= or when the subquery is used as an expression.

Can we use and in case statement in SQL?

CASE must include the following components: WHEN , THEN , and END . ELSE is an optional component. You can make any conditional statement using any conditional operator (like WHERE ) between WHEN and THEN . This includes stringing together multiple conditional statements using AND and OR .

How do I do an if statement in SQL?

Syntax. In the following SQL IF Statement, it evaluates the expression, and if the condition is true, then it executes the statement mentioned in IF block otherwise statements within ELSE clause is executed. We can understand SQL IF Statement using the following flow chart.

How can we insert data into a view?

Only the select statement is stored on the database instead. However, views can be used and perform DML operations ( Insert , Update & Delete ) also. You can insert data to the above tables using the views we have just created. And it is the same syntax that we use to insert data to tables.

Can we use join in insert query?

Example 5: INSERT INTO SELECT statement with Join clause to get data from multiple tables. We can use a JOIN clause to get data from multiple tables. These tables are joined with conditions specified with the ON clause. Suppose we want to get data from multiple tables and insert into a table.

How do you use insert and select queries together?

The INSERT INTO SELECT statement copies data from one table and inserts it into another table.INSERT INTO SELECT requires that data types in source and target tables match.The existing records in the target table are unaffected.

Can we use case in insert statement in Oracle?

We can insert data into SQL tables as well with the help of Case statement in SQL. … In the insert statement, you can we are using a Case statement to define corresponding value to insert in the employee table. In the Case statement, it checks for the required values and inserts values from THEN expression in the table.

Can we use insert statement in function in SQL?

“Functions have only READ-ONLY Database Access” If DML operations would be allowed in functions then function would be prety similar to stored Procedure. No, you can not do Insert/Update/Delete. Functions only work with select statements. And it has only READ-ONLY Database Access.

Can we write DDL statements in functions?

No DDL allowed: A function called from inside a SQL statement is restricted against DDL because DDL issues an implicit commit. You cannot issue any DDL statements from within a PL/SQL function. Restrictions against constraints: You cannot use a function in the check constraint of a create table DDL statement.

Can we write case in where clause?

Where Can I use a CASE Statement? … 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.

How do you write a case in SQL?

SQL CASE StatementCASE. WHEN condition1 THEN result1. WHEN condition2 THEN result2. WHEN conditionN THEN resultN. ELSE result. … Example. SELECT OrderID, Quantity, CASE. WHEN Quantity > 30 THEN ‘The quantity is greater than 30’ WHEN Quantity = 30 THEN ‘The quantity is 30’ … Example. SELECT CustomerName, City, Country. FROM Customers. ORDER BY. (CASE.