{ fn CONVERT (value-exp, data-type) } /* ODBC CAST (value-exp AS data-type) /* SQL92 SQL-92CAST函数要求哪些数据类型可以转换为其他数据类型。 (有关详细信息,请参阅 SQL-92 规范。) 在 FIPS 过渡级别支持CAST函数。 应用程序可以确定对CAST函数的支持,如下所示: ...
The following example uses the SQLSELECTcommand to retrieve data from the Product_ID field in the Products table from the Visual FoxPro sample database, TestData.dbc. The example uses theCAST( )function to convert the results returned from the expression unit_Cost * in_Stock, which haveCurrency...
The following example uses the SQL SELECT command to retrieve data from the Product_ID field in the Products table from the Visual FoxPro sample database, TestData.dbc. The example uses the CAST( ) function to convert the results returned from the expression unit_Cost * in_Stock, which ...
The following example uses the SQL SELECT command to retrieve data from the Product_ID field in the Products table from the Visual FoxPro sample database, TestData.dbc. The example uses the CAST( ) function to convert the results returned from the expression unit_Cost * in_Stock, which ...
CAST(eExpression AS cDataType [(nFieldWidth [, nPrecision])] [NULL | NOT NULL]) Parameters eExpression Specifies a data expression, usually in a SQL statement, that you want to convert to another data type. eExpression can be a field, calculated field, or other type of expression. ...
The following example uses the SQLSELECTcommand to retrieve data from the Product_ID field in the Products table from the Visual FoxPro sample database, TestData.dbc. The example uses theCAST( )function to convert the results returned from the expression unit_Cost * in_Stock, which haveCurrency...
SQL-92 中定義的 CAST函數相當於ODBC 中定義的 CONVERT函數。 對等函式的語法如下所示: { fn CONVERT (value-exp, data-type) } /* ODBC CAST (value-exp AS data-type) /* SQL92 SQL-92CAST函式會要求哪些資料類型可以轉換成其他資料類型。 (如需詳細資訊,請參閱 SQL-92 規格。FIPS 過渡層級支援 CAS...
CAST ( expression AS data_type [ ( length ) ] ) CONVERT语法: CONVERT ( data_type [ ( length ) ] , expression [ , style ] ) Transact-SQL 语法约定 参数 expression 任何有效的表达式。 data_type 目标数据类型。 这包括 xml、bigint 和sql_variant 。 不能使用别名数据类型。
SQL 复制 SELECT CAST(10.3496847 AS money); 将非数字 char、nchar、nvarchar 或 varchar 数据转换为 decimal、float、int、numeric 时,SQL Server 返回错误消息 。 当空字符串 (" ") 转换为 numeric 或 decimal 时,SQL Server 也返回错误 。某些日期时间的转换具有不确定性从string 到 datetime 的转...
一、SQL Server 系统函数 1.字符串函数 1.ascii(string) -- 字符串转为ASCII码 2.char(int) -- ASCII码转为字符串 3.concat(string) --多个字符串连接成一个字符串 4.len(string) -- 长度 5.datalength(