CALL test_mysql_while_loop(); 执行上面查询语句,得到以下结果 mysql> CALL test_mysql_while_loop(); +---+ | str | +---+ | 1,2,3,4,5, | +---+ 1 row in set Query OK, 0 rows affected 1. 2. 3. 4. 5. 6. 7. 8. 9. REPEAT循环 REPEAT循环语句的语法如下: REPEAT statements...
CREATEPROCEDUREtest_mysql_loop()BEGINDECLARExINT;DECLAREstrVARCHAR(255);SETx=1;SETstr=''; loop_label: LOOP IF x>10THENLEAVE loop_label;ENDIF;SETx=x+1; IF (x mod2)THENITERATE loop_label;ELSESETstr=CONCAT(str,x,',');ENDIF;ENDLOOP;SELECTstr;END; AI代码助手复制代码 上述sql具体作用如下:...
在MySQL 中,SQL 本身并不直接支持 WHILE 循环结构来进行插入操作。通常,这种操作会使用编程语言(如 Python、PHP、Java 等)与 MySQL 数据库进行交互,通过编程语言中的循环结构来执行多次插入操作。 然而,如果你希望使用 SQL 来模拟类似 WHILE 循环的插入操作,可以考虑使用存储过程(Stored Procedure)和循环语句(LOOP 或...
Summary:in this tutorial, you will learn how to use various loop statements in MySQL includingWHILE,REPEATandLOOPto run a block of code repeatedly based on a condition. MySQL provides loop statements that allow you to execute a block of SQL code repeatedly based on a condition. There are thr...
Summary: in this tutorial, you will learn how to use various loop statements in MySQL including WHILE, REPEAT and LOOP to run a block of code repeatedly based on a condition. MySQL provides loop statements that allow you to execute a block of SQL code repeatedly based on a condition. ...
最开始查搜索引擎mysql是支持if判断的,根据格式写完sql也不能执行会报错。经过更细致的学习,发现如果要在mysql中进行一些逻辑判断,需要定义存储过程,相当于一些函数,就可以实现一些逻辑判断或者循环。 下面进入正式学习: 1.存储过程书写格式 DELIMITER $$ CREATE PROCEDURE my_procedure() ...
After reading this article you will understand the basics of using the WHILE statement to write a loop within a stored procedure. All the examples for this lesson are based on Microsoft SQL Server Management Studio and the sample databases AdventureWorks and WideWorldImporters. Start learning SQL ...
存储javasql数据库云数据库 SQL Server 存储过程(Stored Procedure)是在大型数据库系统中,一组为了完成特定功能的SQL 语句集,它存储在数据库中,一次编译后永久有效,用户通过指定存储过程的名字并给出参数(如果该存储过程带有参数)来执行它。存储过程是数据库中的一个重要对象。 布禾 2021/04/09 1.3K0 MySQL数据库...
I often use loops with dynamic sql to get fill rates in tables over a period of time. I started messing around this afternoon and am struggling a bit getting the following loop to execute. I did finally see on my last google search that a loop must be in a procedure so that seems ...
A question about regular expressions in T-SQL A stored procedure returning a boolean value indicating wheter a specified value exists in a table. A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error: 0 - The semaphore timeout period has ex...