❮ Previous ❮ SQL Server Functions Next ❯ ExampleGet your own SQL Server Convert a value to an int datatype: SELECT CAST(25.65 AS int); Try it Yourself » Definition and UsageThe CAST() function converts a value (of any type) into a specified datatype....
select CAST('00001' AS SIGNED INTEGER) AS int_col; 1. 2. 2.将字符转换为日期类型 select cast('2018-11-12' AS DATE) AS sate_col; 1. 3.COALESC()E——将null转换为其他值 COALESCE(参数1,参数2,参数3...)参数个数时可变的,可以无限个。 --SQL Server, PostgreSQL, MySQL SELECT COALESCE(...
CHARINDEX('7.0', 'Microsoft SQL Server 2000') 在这个例子中,CHARINDEX返回零,因为字符串“7.0” 不能在“Microsoft SQL Server”中被找到。接下来通过两个例子来看看如何使用CHARINDEX函数来解决实际的T-SQL问题。 4. ALTER function ufn_IsNullOrEmpty(@expression sql_variant, @Replace sql_variant) returns sql...
Explicit conversions require specification of the CAST function or the CONVERT function. The following illustration shows all explicit and implicit data type conversions allowed for SQL Server system-supplied data types. These include bigint, and sql_variant, and xml. There is no implicit conversion ...
CAST (expression AS data_type) 参数说明: expression:任何有效的SQServer表达式。 AS:用于分隔两个参数,在AS之前的是要处理的数据,在AS之后是要转换的数据类型。 data_type:目标系统所提供的数据类型,包括bigint和sql_variant,不能使用用户定义的数据类型。
一.FUNCTION: 在sqlserver2008中有3中自定义函数:标量函数/内联表值函数/多语句表值函数,首先总结下他们语法的异同点: 同点:1.创建定义是一样的: a, CREATE FUNCTION F_NAME(传入的参数名称 传入参数的类型) b,RETURNS 返回值类型 c,AS 异点:1.标量函数返回的是一个数据类型值,内联表值函数返回的是一个...
CREATE FUNCTION [dbo].[CNumeric](@num numeric(14,2)) returnsnvarchar(100)BEGIN Declare @n_data nvarchar(20),@c_data nvarchar(100) ,@n_str nvarchar(10),@i int Set @n_data=right(space(14) +cast(cast(abs(@num*100) as bigint) as nvarchar(20)),14) Set @c_data='' Set @i=1...
Explicit conversions require specification of the CAST function or the CONVERT function. The following illustration shows all explicit and implicit data type conversions allowed for SQL Server system-supplied data types. These include bigint, and sql_variant, and xml. There is no implicit conversion ...
SQL Server .NET API 浏览器 Microsoft.SqlServer.TransactSql.ScriptDom C# 使用英语阅读 保存 添加到集合 添加到计划 通过 Facebook x.com 共享 LinkedIn 电子邮件 打印 FunctionCall 类 参考 反馈 定义 命名空间: Microsoft.SqlServer.TransactSql.ScriptDom 程序...
Explicit conversions require specification of the CAST function or the CONVERT function. The following illustration shows all explicit and implicit data type conversions allowed for SQL Server system-supplied data types. These include bigint, and sql_variant, and xml. There is no implicit conversion ...