This SQL Server tutorial explains how to use the WHILE LOOP in SQL Server (Transact-SQL) with syntax and examples. In SQL Server, you use a WHILE LOOP when you are not sure how many times you will execute the loop body and the loop body may not execute e
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. The WHILE loop statement continues to execute the statements between the LOOP and END LOOP as long...
In this tutorial, we will look at examples of a WHILE loop in T-SQL and discuss alternatives like a CTE and cursor. SQL WHILE Loop Syntax The syntax is like this: WHILE CONDITION BEGIN CODE BREAK --Optional CONTINUE --Optional END WHILE Loop Example In this simple example, we will creat...
Whereas the number of iterations through aWHILEloop is unknown until the loop completes, the number of iterations through aFORloop is known before the loop is entered. NumericFORloops iterate over a specified range of integers. The range is part of an iteration scheme, which is enclosed by th...
DECLARE done BOOLEAN; -- Initial value is NULL by default counter NUMBER := 0; BEGIN done := FALSE; -- Assign literal value WHILE done != TRUE -- Compare to literal value LOOP counter := counter + 1; done := (counter > 500); -- Assign value of BOOLEAN expression END LOOP; END...
syntaxsql WHILEboolean_expression{sql_statement|statement_block|BREAK|CONTINUE} Syntax for Azure Synapse Analytics and Analytics Platform System (PDW). syntaxsql WHILEboolean_expression{sql_statement|statement_block|BREAK} Arguments boolean_expression ...
SQL SyntaxLast update on August 19 2022 21:50:45 (UTC/GMT +8 hours) Query Syntax of SQL Query LanguageThis page describes the syntax of SQL. Each select statement in SQL follows precise syntactical and structural rules. The following statement is the minimum structure and syntax required for...
syntaxsql 複製 <join_hint> ::= { LOOP | HASH | MERGE | REMOTE | REDUCE | REPLICATE | REDISTRIBUTE [(columns count)]} 引數 { LOOP |HASH |MERGE } 適用於: Azure SQL Database、Azure SQL 受控實例、SQL 分析端點、Microsoft網狀架構中的 SQL 資料庫、Microsoft網狀架構倉儲 指定查詢中的聯結應...
syntaxsql 复制 ALTER INDEX { index_name | ALL } ON { REBUILD { [ PARTITION = ALL [ WITH ( <rebuild_index_option> [ , ...n ] ) ] ] | [ PARTITION = partition_number [ WITH ( <single_partition_rebuild_index_option> [ , ...n ] ) ] ] } | DISABLE | REORGANIZE [ PARTITIO...
1、Loop……end Loop语句标准格式: LOOP statement_list--循环代码块 IF exit_condition THEN EXIT;--满足IF条件 退出循环...pl/sql中“=”表示比较,“:=”表示赋值。...--标准格式: While loop 要执行的语句; ...