SELECT CAST(1 AS BIT) AS One, CAST(7 AS BIT) AS Num, CAST(743.6 AS BIT) AS Frac, CAST(0.3 AS BIT) AS Zerofrac, CAST('tRuE' AS BIT) AS TrueWord, CAST(0 AS BIT) AS Zero, CAST('FALSE' AS BIT) AS FalseWord, CAST('T' AS BIT) AS T, CAST('F' AS BIT) AS F, CAST(...
SELECT CAST(1AS BIT) AS One, CAST(7AS BIT) AS Num, CAST(743.6AS BIT) AS Frac, CAST(0.3AS BIT) AS Zerofrac, CAST('tRuE'AS BIT) AS TrueWord, CAST(0AS BIT) AS Zero, CAST('FALSE'AS BIT) AS FalseWord, CAST('T'AS BIT) AS T, CAST('F'AS BIT) AS F, CAST(0.0AS BIT) AS...
SELECT CAST(1 AS BIT) AS One, CAST(7 AS BIT) AS Num, CAST(743.6 AS BIT) AS Frac, CAST(0.3 AS BIT) AS Zerofrac, CAST('tRuE' AS BIT) AS TrueWord, CAST(0 AS BIT) AS Zero, CAST('FALSE' AS BIT) AS FalseWord, CAST('T' AS BIT) AS T, CAST('F' AS BIT) AS F, CAST(...
CAST(1 AS BIT) -- 将整数 1 转换成布尔类型 TRUECAST(0 AS BIT) -- 将整数 0 转换成布尔类型 FALSE 2.5 将Interger 类型转换成 FLOAT 类型 CAST( 7 AS float) --7.0
MONEY | SMALLMONEY) CAST(expr AS DATE) CAST(expr AS TIME) CAST(expr AS POSIXTIME) CAST(expr AS TIMESTAMP | DATETIME | SMALLDATETIME) CAST(expr AS BIT) CAST(expr AS BINARY | BINARY VARYING | VARBINARY) CAST(expr AS BINARY(n) | BINARY VARYING(n) | VARBINARY(n) ) CAST(expr AS ...
SELECTCAST(1ASBIT)ASOne,CAST(7ASBIT)ASNum,CAST(743.6ASBIT)ASFrac,CAST(0.3ASBIT)ASZerofrac,CAST('tRuE'ASBIT)ASTrueWord,CAST(0ASBIT)ASZero,CAST('FALSE'ASBIT)ASFalseWord,CAST('T'ASBIT)AST,CAST('F'ASBIT)ASF,CAST(0.0ASBIT)ASZerodot ...
将字符表达式转换为其它大小的数据类型时,对于新的数据类型过长的值将被截断,SQL Server 将在osql实用工具和 SQL 查询分析器中显示星号 (*)。若数字表达式对于新的数据类型太长而无法显示,值将截断。下面是字符截断的示例: USE pubsSELECTSUBSTRING(title,1,25)ASTitle,CONVERT(char(2), ytd_sales)FROMtitlesWHER...
第二十二章 SQL函数 CAST(一) 将给定表达式转换为指定数据类型的函数。 大纲 CAST(exprASCHAR|CHARACTER|VARCHAR|NCHAR|NVARCHAR)CAST(exprASCHAR(n)|CHARACTER(n)|VARCHAR(n))CAST(exprASCHARVARYING|CHARACTERVARYING)CAST(exprASINT|INTEGER|BIGINT|SMALLINT|TINYINT)CAST(exprASDEC|DECIMAL|NUMERIC)CAST(exprASDEC...
SELECTCAST('0'ASBIT)AsBitFalse,CAST('1'ASBIT)AsBitTrue; Output If we compile and run the above query, the result is produced as follows − +---+---+ | BitFalse | BitTrue | +---+---+ | 0 | 1 | +---+---+ Example Considering the following example, where we are using ...
CAST( 表达式搜索条件NULL参数标记 AS数据类型) 数据类型 内置类型单值类型数组类型 内置类型 SMALLINTINTEGERINTBIGINTDECIMALDECNUMERICNUM(5,0)(整数,0,整数)FLOAT(53)(整数)REALDOUBLEPRECISIONDECFLOAT(34)(16)CHARACTERCHAR(1)(整数)CHARACTERCHARVARYINGVARCHAR(整数)FOR BIT DATAFOR SBCS DATAFOR MIXED DATAccsi...