Assume that you execute a Transact-SQL query in Microsoft SQL Server 2012. When the query contains a long case statement, the query fails. Additionally, you receive the following error: Msg 8631, Level 17, State 1, Line 7...
'VARCHAR' is not a recognized built-in function name. 'WHEN MATCHED' cannot appear more than once in a 'UPDATE' clause of a MERGE statement. "EXECUTE AT" with Dynamic Linked Server Name "explicit value must be specified for identity column in table" error in SQL 2000 "FROM clause have ...
Simple Case Statement CASE [input_expression] WHEN when_expression THEN when_true_result_expression [...n] [ELSE else_result_expression] END Search Case Statement CASE WHEN Boolean_expression THEN when_true_result_expression [...n] [ELSE else_result_expression] END ...
Simple Case Statement CASE [input_expression] WHEN when_expression THEN when_true_result_expression [...n] [ELSE else_result_expression] END Search Case Statement CASE WHEN Boolean_expression THEN when_true_result_expression [...n] [ELSE else_result_expression] END 引數 input_expression 解析...
query requirements into simpler, and sometimes more efficient SQL statements. The CASE expression enables many forms of conditional processing to be placed into a SQL statement. By using CASE, more logic can be placed into SQL statements instead of being expressed in a host language or 4GL ...
There are two main types of CASE statements in SQL: simple CASE searched CASE They differ in how they compare values or evaluate conditions. 3.1. Simple CASE To begin with,a simple CASE statement compares an expression to one or more possible values. It has a simple format: ...
将URL添加到SQL Case语句中,可以通过以下步骤实现: 1. 首先,确保数据库中有一个包含URL的表,其中至少包含一个列用于存储URL。 2. 在SQL Case语句中,使用URL作为条件进...
我想使用CASE语句根据某些条件选择输入的数据SQL中的CASE WHEN使用 Case具有两种格式。简单Case函数和Case...
supportsStatementPooling 方法 (SQLServerDatabaseMetaData) supportsStoredProcedures 方法 (SQLServerDatabaseMetaData) supportsStoredFunctionsUsingCallSyntax 方法 (SQLServerDatabaseMetaData) supportsSubqueriesInComparisons 方法 (SQLServerDatabaseMetaData) supportsSubqueriesInExists 方法 (SQLServerDatabaseMet...
Errors in evaluating these expressions are possible. Aggregate expressions that appear in WHEN arguments to a CASE statement are evaluated first, then provided to the CASE statement. For example, the following query produces a divide by zero error when producing the value of the MAX aggregate. ...