For example: CREATE PROCEDURE SUBWOOFER() ... No two identically-named procedures within a schema are permitted to have exactly the same number of parameters. A duplicate signature raises an SQL error (SQLSTATE 42723). For example, given the statements: CREATE PROCEDURE PART (IN NUMBER INT...
An example of an external action is sending a message or writing a record to a stream file. The default is EXTERNAL ACTION. EXTERNAL ACTION Specifies that the procedure can take an action that changes the state of an object that the database manager does not manage. EXTERNAL ACTION should ...
例如,要使用insert_user存储过程向users表格中插入一条新记录,可以使用以下SQL语句: CALL insert_user('john_doe', 'john.doe@example.com', 'secure_password'); 修改存储过程 要修改存储过程的定义,可以使用DROP PROCEDURE语句删除现有存储过程,然后使用CREATE PROCEDURE语句重新创建。在某些数据库管理系统中,还可以...
The following SQL creates a stored procedure named "SelectAllCustomers" that selects all records from the "Customers" table:ExampleGet your own SQL Server CREATE PROCEDURE SelectAllCustomersASSELECT * FROM CustomersGO; Execute the stored procedure above as follows:...
Create Triger Example CREATE OR REPLACE TRIGGERmy_sal_changes BEFORE DELETE OR INSERT OR UPDATE ON Emp_tab FOR EACH ROW WHEN (new.Empno > 0) DECLARE sal_diff number; BEGIN sal_diff := :new.sal – :old.sal; dbms_output.put(‘Old salary: ‘ || :old.sal); ...
IN OUT - The parameter can be referenced by the procedure or function and the value of the parameter can be overwritten by the procedure or function. The following is a simple example of a procedure: CREATE OR REPLACE Procedure UpdateCourse ...
CREATE PROC What_DB_is_this AS SELECT DB_NAME() AS ThisDB; Call the store procedure with statement: EXEC What_DB_is_this;Slightly more complex, is to provide an input parameter to make the procedure more flexible. For example:SQL Kopier ...
Is an optional integer that is used to group procedures of the same name. These grouped procedures can be dropped together by using one DROP PROCEDURE statement. For example, an application calledordersmight use procedures namedorderproc;1,orderproc;2, and so on. The DROP PROCEDUREorderprocstate...
===Example 2=== [oracle@localhost notes]$ vim s73.sql CREATE OR REPLACE PROCEDURE query_emp (p_id IN employees.employee_id%TYPE, p_name OUT employees.last_name%TYPE, p_salary OUTemployees.salary%TYPE) IS BEGIN SELECT last_name,salary INTO p_name, p_...
procedure can be executed without specifying a value for that parameter. The default value must be a constant or it can be NULL. The constant value can be in the form of a wildcard, making it possible to use the LIKE keyword when passing the parameter into the procedure. See Example C ...