SQLServer cast
时间: 2023-08-31 09:07:58 浏览: 36
SQL Server中的CAST函数用于将一个数据类型转换为另一个数据类型。它的语法如下:
```sql
CAST(expression AS data_type)
```
其中,`expression`是要转换的表达式,`data_type`是目标数据类型。
示例:
```sql
SELECT CAST('123' AS INT) AS Result;
```
这个示例将字符串 '123' 转换为整数类型 INT,并将结果命名为 Result。
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sqlserver CAST
CAST is a SQL Server function used to convert one data type to another. It allows you to explicitly specify the desired data type for a value or column in a query. Here's the basic syntax:
```sql
CAST(expression AS data_type)
```
The `expression` can be any valid SQL Server expression, such as a column, variable, or literal value. The `data_type` specifies the target data type to which you want to convert the expression.
For example, if you have a column `Age` of type `int` and you want to convert it to `varchar`, you can use CAST like this:
```sql
SELECT CAST(Age AS varchar) AS ConvertedAge FROM YourTable
```
This will return a new column `ConvertedAge` with the age values converted to `varchar`.
Keep in mind that not all data type conversions are supported, and you should ensure that the conversion is valid for your specific scenario.
sql server cast
在 SQL Server 中,CAST 函数用于将一个数据类型的值转换为另一个数据类型。它的语法如下:
```
CAST (expression AS data_type)
```
其中,`expression` 是要转换的值,`data_type` 是目标数据类型。以下是一些示例:
1. 将字符串转换为整数类型:
```
SELECT CAST('10' AS INT)
```
2. 将整数转换为字符串类型:
```
SELECT CAST(100 AS VARCHAR)
```
3. 将日期时间转换为日期类型:
```
SELECT CAST(GETDATE() AS DATE)
```
请注意,在进行数据类型转换时,确保目标数据类型能够容纳源数据类型的值,否则可能会导致截断或溢出的问题。