Azure SQL 托管实例 本主题列出了 T-SQL 的外围应用以及本机编译 T-SQL 模块主体支持的功能,如存储过程 (CREATE PROCEDURE (Transact-SQL))、标量用户定义函数、内联表值函数和触发器。 有关本机模块定义的支持功能,请参阅对于本机编译的 T-SQL 模块支持的 DDL。 如需...
Purpose of WHILE loops Replace cursors in Synapse SQL Next steps This article provides you with essential tips for using T-SQL loops, replacing cursors, and developing related solutions with Synapse SQL. Purpose of WHILE loops Synapse SQL supports theWHILEloop for repeatedly executing statement blocks...
问如何在TSQL中使用循环？EN人们希望学习批处理命令的一个普遍原因是要得到批处理强大的功能。如果你希望...
Sets a condition for the repeated execution of a SQL statement or statement block. 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....
T-sql For in loop 变量循环语句 For 变量 in 循环开始的值 .. 循环结束的值(小于该值) Loop --做处理的语句 End Loop 例子: ---循环找出供应商 for i in 0 .. vendor_Total loop-- i 和 vendor_Total 在存储过程头部定义,vendor_Total 在循环之前已经赋值...
WHILE语法:DO $$ DECLARE counter INT := 0; BEGIN WHILE counter < 5 LOOP counter := counter + 1; RAISE NOTICE 'Counter: %', counter; END LOOP; END $$; 4. SQL Server中的WHILE语句SQL Server只提供WHILE循环语句。语法:WHILE Boolean_expression BEGIN -- 循环体 [ BREAK ] [ CONTINUE ] ...
while instr(str_vendors, ':') > 0 loop vendor_Total := vendor_Total + 1; vendors_len := instr(str_vendors, ':'); str_vendors := substr(str_vendors, vendors_len + 1, length(str_vendors) - vendors_len); end loop; while instr(str_VASSIGNs, ':') > 0 loop ...
When executing the procedure from a Transact-SQL batch or another stored procedure, avoid using a cursor with the natively compiled stored procedure. When creating a natively compiled stored procedure, rather than using a cursor, use set-based logic or a WHILE loop. Feature Non-constant parameter...
SQL 复制 WHILE (1=1) BEGIN IF EXISTS (SELECT * FROM ##MyTempTable WHERE EventCode = 'Done') BEGIN BREAK; -- 'Done' row has finally been inserted and detected, so end this loop. END PRINT N'The other process is not yet done.'; -- Re-confirm the non-done status to the consol...
在SQL中,循环语句不像在传统编程语言(如Python、Java等)中那样直接。不同的数据库管理系统(DBMS)对循环的支持方式有所不同。以下是一些常见的DBMS(如MySQL、PostgreSQL和SQL Server)中实现循环的方式:MySQL中的循环在MySQL中,你可以使用LOOP语句在一个存储过程或存储函数中创建循环。此外,还可以使用WHILE和REPEAT循环...