DELIMITER$$CREATEPROCEDUREforeach_example()BEGINDECLAREdoneINTDEFAULTFALSE;DECLAREstudent_nameVARCHAR(50);DECLAREstudent_scoreINT;DECLAREcurCURSORFORSELECTname,scoreFROMstudents;DECLARECONTINUEHANDLERFORNOTFOUNDSETdone=TRUE;OPENcur;read_loop:LOOPFETCHcurINTOstudent_name,student_score;IFdoneTHENLEAVEread_loop;END...
<insert id="foreachSelectKeyInsert"parameterType="java.util.List"><selectKey resultType="java.lang.Integer"keyProperty="iid"order="AFTER">SELECTLAST_INSERT_ID()</selectKey>insert intoforeach_test(name,age,idx)values<foreachitem="st"collection="list"index="idx"open=""separator=","close="">(#...
Can someone help me with the syntax to insert a foreach statement right before the echo statements? All the examples that I see online don't seem to translate for me. Thanks in advance. Here is the code: <?php $db =& JFactory::getDBO(); ...
在MySQL 中没有直接的 foreach 语法,但可以通过使用循环语句(如 WHILE、LOOP、REPEAT)结合游标(CURSOR)来实现类似的功能。 以下是一个示例: DELIMITER // CREATE PROCEDURE foreach_example() BEGIN DECLARE done INT DEFAULT FALSE; DECLARE id INT; DECLARE name VARCHAR(255); DECLARE cur CURSOR FOR SELECT i...
以下是一个使用WHILE循环和CURSOR模拟FOREACH循环的示例: DELIMITER $$ CREATE PROCEDURE foreach_example() BEGIN DECLARE done INT DEFAULT FALSE; DECLARE current_id INT; DECLARE cur CURSOR FOR SELECT id FROM your_table; DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE; OPEN cur; read_loop:...
end loop [标签]; loop相当于一个死循环,需要使用leave和iterate来控制循环 http://c.biancheng.net/view/7853.html 在存储过程和自定义函数中可以使用流程控制语句来控制程序的流程。MySQL 中流程控制语句有:IF 语句、CASE 语句、LOOP 语句、LEAVE 语句、ITERATE 语句、REPEAT 语句和 WHILE 语句等。
loop 与 repeat 相似之处:它们都不需要结束条件。 代码语言:txt AI代码解释 语法格式: [begin_lable:] loop statements end loop [end_lable]; //创建名称为Pro的存储过程 delimiter $$ create procedure pro() begin declare num int default 1;
DELIMITER // CREATE PROCEDURE BatchUpdate(IN threshold INT) BEGIN DECLARE done INT DEFAULT FALSE; DECLARE id INT; DECLARE cur CURSOR FOR SELECT id FROM your_table WHERE some_condition <= threshold; DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE; OPEN cur; read_loop: LOOP FETCH cur ...
i have yesterday migrated a project from ms Sql to MySql, the project worked fine with Sql but now with MySql, i'm getting an error on sections where there is an async method inside a foreach loop , like the example bellowi'm using the Pomelo.EntityFrameworkCore.MySql nuget package...
end foreach; 此外,foreach array也是循环处理数据库中的一组数据,使用方法如下: Declare a_array as int[]; //定义数组 Set a_array = array[1,2,3,4,5]; //初始化数组 Foreach val IN a_array loop //使用循环 处理val数据 end loop; 通过以上两种用法,可以对数据库中的数据进行循环处理,省去了...