decimal、numericString bit布林值 binary、varbinary、image一維的Byte()陣列 intLong smallint整數 tinyint位元組 floatDouble realSingle money、smallmoney貨幣 datetime、smalldatetime日期 設定為NULL的任何項目Variant設為 Null 所有單一的 SQL Server 值皆會轉換成單一的 Visual Basic 值,但不包括binary、varbinary及...
@birthday=出生日期 FROM雇员 WHERE雇员ID=1 PRINT ’雇员姓名:' +@name PRINT ’雇员生日:' +CONVERT(varchar(50), @birthday,102) GO PRINT ’雇员姓名:' +@name PRINT ’雇员生日:' +CONVERT(varchar(50), @birthday,102)
CONVERT ( data_type, expression) SELECTCAST('-30'ASINT)ASv1,CONVERT(DECIMAL,'3.1415726')ASv2,CONVERT(DATETIME,'
--used to convert hex to decimal@resultBIGINT,--the value of the hex symbol being parsed@indexSMALLINT,--used for parsing the hex value@EscapeINT--the index of the next escape characterDECLARE@StringsTABLE/* in this temporary table we keep all strings, even the Names of the elements,...
decimal及numericfloat或real可能遺失有效位數 int、smallint、tinyint、float、real、money或smallmoneydecimal及numeric可能的溢位 根據預設,SQL Server 在將數字轉換成有效位數與小數位數較小的decimal或numeric值時會使用四捨五入。 相反地,如果SET ARITHABORT選項為ON,SQL Server 會在發生溢位時引發錯誤。 只是流失有...
其範例如下: select convert(decimal(3,2),0.345) [0.345],CONVERT(decimal(3,2),0.2345) [0.2345] 其執行結果如圖 4-12 所示: 語言基礎與資圖 4-12:Decimal 資料類型四捨五入到有效的小數位數 料類型 4-2-4-2 Round 函數 若要處理四捨五入,較常搭配使用 Round 函數,以四捨五入或捨去到指定長度的 ...
Convert between ASCII or UNICODE code to a string character. SELECT CHAR(65) 'A' Numeric integer value as input. CHARINDEX and PATINDEX Find the starting position of one string expression or string pattern within another string expression. SELECT CHARINDEX...
例如,decimal(15,5),表示共有15位数,其中整数10位,小数5位。表4.2列出了各精确度所需的字节数之间的关系。表4.2 DE CIMAL数据类型的精度与字节数4.2.4 逻辑数据类型逻辑数据类型BIT占用1个字节的存储空间,其值为0或1。如果输入0或1以外的值,将被视为l。BIT类型不能定义为NULL值(所谓NULL值是指空值或无...
Case WHEN and concatenate string CASE WHEN isnumeric(ColValue) THEN ... ELSE ... END CASE WHEN MIN,SUM ETC. CASE WHEN Problem with CASE NULL cast nvarchar to smalldatetime Cast a varchar(6), 112 as date CAST and IsNull together cast or convert nvarchar with comma as decimal separator ...
Convert a binary string to an integer. Since numbers like 10 and 111 can be either binary or decimal, you will need a way for the code calling the stored procedure to indicate which format is intended. If the procedure is converting to binary, it should always return a multiple of 8 cha...