PL/SQL Code: CREATEORREPLACEFUNCTIONget_left_department_name(p_department_idINdepartments.department_id%TYPE)RETURNVARCHAR2ASv_department_namedepartments.department_name%TYPE;v_resultVARCHAR2(5);BEGINBEGINSELECTdepartment_nameINTOv_department_nameFROMdepartmentsWHEREdepartment_id=p_department_id;EXCEPTIONWHEN...
Control Structures of PL/SQL Control structures are probably the most useful (and important) part of PL/pgSQL.With PL/pgSQL's control structures, you can manipulate PostgreSQL data in a very flexible and powerful way. 1.Returning From a Function RETURN RETURNexpression; RETURN with an expressio...
LAST_ERROR_POSITION Function:Definition,Search for examples LAST_ROW_COUNT Function:Definition,Search for examples LAST_ROW_ID Function:Definition,Search for examples LAST_SQL_FUNCTION_CODE Function:Definition,Search for examples LAST_VALUE:Definition,Search for examples LCR$_DDL_RECORD Constructor:Definiti...
In eitherenvironment, the PL/SQL engine accepts as input any valid PL/SQL unit. Theengine runs procedural statements, but sends SQL statements to the SQL enginein the database, as shown in Figure1-1. --PL/SQL 引擎接收任何有效的PL/SQL 单元,然后执行里面的过程语句,但是对于SQL...
For any SQL command that does not return rows, for example INSERT without a RETURNING clause, you can execute the command within a PL/pgSQL function just by writing the command. To evaluate an expression or SELECT query but discard the result, use: ...
Command> DECLARE v_sum_sal NUMBER (10,2); v_dept_no NUMBER NOT NULL := 60; BEGIN SELECT SUM(salary) -- aggregate function INTO v_sum_sal FROM employees WHERE department_id = v_dept_no; DBMS_OUTPUT.PUT_LINE ('Sum is ' || v_sum_sal); END; / Sum is 28800 PL/SQL procedure ...
In PL/SQL, we can pass parameters to procedures and functions in three ways. 1) IN type parameter:These types of parameters are used to send values to stored procedures. 2) OUT type parameter:These types of parameters are used to get values from stored procedures. This is similar to a ...
3. PLSQL集合方法 在下面提供了很多用于集合的方法。 3.1 COUNT COUNT返回集合中的元素数目。因为嵌套表可能会有个别空元素,当COUNT用于嵌套表时,就返回嵌套表中非空元素的数目。 CREATE PACKAGE collection_method_examples AS FUNCTIONget_addresses( p_idcustomers_with_nested_table.id%TYPE ...
Function to return employees names by dept Feb 3, 2016 get_employees_by_job function Function to get names of employees by job id Mar 17, 2016 get_highest_paid_employees.sql Function to return highest paid employees in dept Sep 22, 2016 ...
further enhancements. If the transpiler cannot convert a PL/SQL function to SQL, execution of the function falls back to the PL/SQL runtime. Only one parameter needs to be adjusted, no further user intervention is required and the entire operation is transparent to users. So give it a try...