Соглашенияосинтаксисе Transact-SQLСинтаксисsyntaxsql Көшіру COALESCE ( expression [ , ...n ] ) АргументывыражениеВыражение любоготипа.Возвращаемыетипы...
SQL Copiar SELECT COALESCE(NULL, NULL, 'third_value', 'fourth_value'); Observação Se você quiser concatenar cadeias de caracteres, use STRING_AGG em vez disso. Convenções de sintaxe de Transact-SQL Sintaxe syntaxsql Copiar COALESCE ( expression [ , ...n ] ) Argumentos ex...
Transact-SQL 语法约定 语法 syntaxsql COALESCE( expression [ , ...n ] ) 参数 expression 任何类型的表达式。 返回类型 返回数据类型优先级最高的 expression 的数据类型 。 如果所有表达式不可为 null,则结果类型化为不可为 null。 备注 如果所有参数都为NULL,则COALESCE返回NULL。 至少应有一个 Null 值为NU...
As an experienced developer, you may have come across the need to handle NULL values in SQL Server. One common function used for this purpose is COALESCE. In this guide, we will walk through the process of using COALESCE in SQL Server, with code examples to help you understand how it wor...
In this article Syntax Arguments Return types Remarks Show 4 more Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL analytics endpoint in Microsoft Fabric Warehouse in Microsoft Fabric ...
Transact-SQL 语法约定 语法 syntaxsql COALESCE( expression [ , ...n ] ) 参数 expression 任何类型的表达式。 返回类型 返回数据类型优先级最高的 expression 的数据类型 。 如果所有表达式不可为 null,则结果类型化为不可为 null。 备注 如果所有参数都为NULL,则COALESCE返回NULL。 至少应有一个 Null 值为NU...
Syntax Arguments Return types Remarks Rodyti dar 4 Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL analytics endpoint in Microsoft Fabric Warehouse in Microsoft Fabric SQL database in Microsoft Fabric Evaluates the...
In this article Syntax Arguments Return types Remarks Show 4 more Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL analytics endpoint in Microsoft Fabric Warehouse in Microsoft Fabric ...
Syntax Arguments Return types Remarks Show 4 more Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL analytics endpoint in Microsoft Fabric Warehouse in Microsoft Fabric SQL database in Microsoft Fabric Evaluates the ...
The SQL Server COALESCE command supports more than two arguments Consider that if you are trying to evaluate more than two inputs, you'll have to nest ISNULL calls, while COALESCE can handle any number. The upper limit is not explicitly documented, but the point is that, for all intents...