Here’s the syntax for the WHILE loop statement: WHILE condition LOOP statements; END LOOP;Code language: PostgreSQL SQL dialect and PL/pgSQL (pgsql) In this syntax, the condition is a boolean expression that evaluates to TRUE, FALSE or NULL. ...
Oracle/PLSQL: While Loop The syntax for the WHILE Loop is: WHILE condition LOOP {.statements.} END LOOP; You would use a WHILE Loop when you are not sure how many times you will execute the loop body. Since the WHILE condition is evaluated before entering the loop, it is possible that...
PL/SQL WHILE LOOP语句 只要给定条件为真,PL/SQL编程语言中的WHILE LOOP语句重复执行目标语句。 语法 WHILE LOOP语句的语法如下 - WHILEconditionLOOP sequence_of_statementsENDLOOP; 示例 以下是有关WHILE LOOP语句的应用示例 - SETSERVEROUTPUTONSIZE1000000;DECLAREa number(2) :=10;BEGINWHILE a<20LOOP dbms_ou...
The statements are executed repeatedly as long as the specified condition is true. The execution of statements in the WHILE loop can be controlled from inside the loop with the BREAK and CONTINUE keywords.Transact-SQL syntax conventionsSyntaxSyntax for SQL Server, Azure SQL Database, Azure SQL ...
Introduction to PL/pgSQL while loop statement The while loop statement executes one or more statements as long as a specified condition is true. Here’s the basic syntax of a while loop statement: [ <> ] while condition loop statements; end loop; In this syntax, PostgreSQL evaluates ...
PL/SQL脚本语言循环loop for while的用法学习示例 (一)、循环学习 (a)、loop 循环 declare -- 求和变量 i变量 1.,。100 v_sum number(5); v_i number(5); begin v_sum :=0; v_i := 1; loop v_sum := v_sum + v_i; v_i := v_i+1; ...
-- loop DECLARE v_num VARCHAR2(100); CURSOR c_num IS SELECT NAME FROM test_t WHERE ROWNUM < 600000; BEGIN dbms_output.enable(800000); OPEN c_num; LOOP FETCH c_num INTO v_num; EXIT WHEN c_num%NOTFOUND; --未找到数据 END LOOP; CLOSE c_num; END; -- while DECLARE v_num3 VARCH...
LOOP -基本循环 WHILE -根据条件循环 FOR -固定次数的循环 create table T_TEST ( id number(5), num number(10) ); 1. 2. 3. 4. 5. LOOP 语法 LOOP sequence_of_statements END LOOP; 1. 2. 3. 4. 5. 示例 DECLARE v_count NUMBER(5):=1; ...
postgresql 游标遍历 while found loop plsql游标循环,一般情况下,数据要以一栏和明细的形式在画面上显示。这种程序相对会复杂一些。例如,首先有一行是部门的数据,在部门下方需要显示多行该部门的员工的信息。然后,再显示下一个部门的数据,再显示部门所属的员工信息;
15. Write a PL/SQL program to display the number of employees in each department using a nested while loop. Return department name and number of employees.Click me to see the solution16. Write a PL/SQL program to display the total number of employees hired each year between 1985 and 2000...