The IF ELSE statement controls the flow of execution in SQL Server. It can be used in stored-procedures, functions, triggers, etc. to execute the SQL statements based on the specified conditions. Syntax: Copy IF Boolean_expression { sql_statement | statement_block } [ ELSE { sql_statement...
指定Transact-SQL 语句的执行条件。 如果满足条件,则执行后跟IF关键字及其条件的 Transact-SQL 语句:布尔表达式返回TRUE。 可选ELSE关键字引入了另一个 Transact-SQL 语句,该IF语句在条件不满足时执行:布尔表达式返回FALSE。 Transact-SQL 语法约定 语法 syntaxsql ...
动态SQL是Mybatis的一个强大的特性,在使用JDBC操作数据时,如果查询条件特别多, 那样将条件串联成SQL字符串是一件痛苦的事情,通常的解决方法是写很多if-else条件语句对字符串进行拼接, 但mybatis使用一种强大的动态SQL语言来改善这种情况,动态SQL基于OGNL表达式, 1. 2. 3. 动态SQL的元素有 使用if+where实现多余查...
mysql> HELP CREATE PROCEDURE; Name: 'CREATE PROCEDURE' Description: Syntax: CREATE [DEFINER = { user | CURRENT_USER }] PROCEDURE sp_name ([proc_parameter[,...]]) [characteristic ...] routine_body CREATE [DEFINER = { user | CURRENT_USER }] FUNCTION sp_name ([func_parameter[,...]])...
Transact-SQL 語法慣例 語法 syntaxsql IFboolean_expression{sql_statement|statement_block} [ELSE{sql_statement|statement_block} ] 引數 boolean_expression 傳回 或FALSE的TRUE表達式。如果boolean_expression包含SELECT語句,SELECT語句必須以括弧括住。 使用語句區塊所定義的任何有效 Transact-SQL 語句或語句群組。 若...
IF/ELSE Syntax Error Posted by:a a Date: August 30, 2008 06:55PM Whats wrong in this small procedure? Script line: 4 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'end if;...
syntaxsql Copy IF boolean_expression { sql_statement | statement_block } [ ELSE { sql_statement | statement_block } ] Arguments boolean_expression An expression that returns TRUE or FALSE. If the boolean_expression contains a SELECT statement, the SELECT statement must be enclosed in parenthes...
Working of if-else Statement in C Let’s explore how the “if-else” statement works in C: if-else Syntax in C: The basic syntax of the “if-else” statement is as follows: if (condition) { // Code block executed if the condition is true } else { // Code block executed if the...
Tables(0).Rows(0).Item("Item") Syntax C# dataview rowfilter using a date C# Dropdown List - Item Removal C# Execute url path in background C# Function return string value C# length of digit after decimal point c# regular expression to only allow 1 or 2 digits only c# show hide div ...
Incorrect syntax near ')'. 我试过使用CASE,结果是一样的: CASE WHEN @etape = 1 THEN (UPDATE table1 SET column1 = 1) WHEN @etape = 2 THEN (UPDATE table2 SET column1 = 1) ELSE (SELECT 'Wrong choice') END 尽管文档中没有提到这一点,但在IF或CASE之后似乎只允许SELECT语句。谢谢你的帮助...