当省略不写时,会列出MySQL数据库中存在的所有存储过程或函数的信息 #从information_schema.Routines表中查看存储过程和函数的信息 SELECT * FROM information_schema.Routines WHERE ROUTINE_NAME='存储过程或函数的名' [AND ROUTINE_TYPE = {'PROCEDURE|FUNCTION'}]; -- 注意: 如果在MySQL数据库中存在存储过程和函...
Call function in dbms_output.put_line : Function Call « Stored Procedure Function « Oracle PL / SQL
FUNCTION tomorrow(v_sum in NUMBER) RETURN DATE; END students_pkg; / build pkb: CREATE OR REPLACE PACKAGE BODY students_pkg IS PROCEDURE print_temp (v_average IN number,v_sum in NUMBER) IS BEGIN dbms_output.put_line('PROCEDURE:print_temp'); END print_temp; FUNCTION tomorrow(v_sum in N...
一般需要计算,并且返回一个计算结果的,个人认为使用函数比较好。 create or replace function my_fun(vempnoinemp.empno%type)returnemp.sal%typeasvsal emp.sal%type; beginselectcasewhen sal*12<=36000then sal*12*0.03when sal*12between3600and144000then sal*12*0.1when sal*12between144000and300000then sa...
The LENGTH() function calculates the length of the job title stored in the v_job_title variable and assigns it to the v_length variable. The DBMS_OUTPUT.PUT_LINE displays the length of the job title in the console. Flowchart: Exercise 3: ...
Here, we create a function namedCalculateAge. Furthermore, the function utilizes PostgreSQL’s built-inage()function to determine the difference between two dates. Since only one argument is provided,age()calculates the difference between the given date and the current date. Consequently, theCalcula...
dbms_output.put_line('Average:'||v_average);dbms_output.put_line('Sum:'||v_sum);END print_temp;二、函数 函数提供了获取对象状态和情形信息的手段,函数有返回值。CREATE OR REPLACE FUNCTION student_status(optional parameters)RETURN VARCHAR2 IS declarative part BEGIN program body RETURN ...
CREATE PROCEDURE and CREATE FUNCTION require the CREATE ROUTINE privilege. If the DEFINER clause is present, the privileges required depend on the user value, as discussed in Section 27.7, “Stored Object Access Control”. If binary logging is enabled, CREATE FUNCTION might require the SUPER privil...
PROCEDURE value_ok ( number_in IN NUMBER ) IS BEGIN IF number_in > 0 THEN DBMS_OUTPUT.put_line( 'Function and Procedure could be overloading each other' ); END IF; END; BEGIN /* Calling first function */ IF value_ok( to_date('1999-01-01','yyyy-mm-dd') ) THEN ...
To invoke a stored procedure, use theCALLstatement (seeSection 13.2.1, “CALL Statement”). To invoke a stored function, refer to it in an expression. The function returns a value during expression evaluation. CREATE PROCEDUREandCREATE FUNCTIONrequire theCREATE ROUTINEprivilege. If theDEFINERclause...