CAST({fn PI()} As INTEGER) As IntegerPi, CAST({fn PI()} As SMALLINT) As SmallIntPi, CAST({fn PI()} As DECIMAL) As DecimalPi, CAST({fn PI()} As NUMERIC) As NumericPi, CAST({fn PI()} As DOUBLE) As DoublePi 1. 2. 3. 4. 5. 6. 注意,在下面的例子中,精度和比例值被解...
CAST(expr AS integer)：将 expr 转换为整数类型。2. 转换为浮点数类型：CAST(expr AS decimal)：将...
SELECT CAST({fn PI()} As INTEGER) As IntegerPi, CAST({fn PI()} As SMALLINT) As SmallIntPi, CAST({fn PI()} As DECIMAL) As DecimalPi, CAST({fn PI()} As NUMERIC) As NumericPi, CAST({fn PI()} As DOUBLE) As DoublePi 注意,在下面的例子中,精度和比例值被解析,但不会改变CAST返...
CAST(expr AS INT | INTEGER | BIGINT | SMALLINT | TINYINT) CAST(expr AS DEC | DECIMAL | NUMERIC) CAST(expr AS DEC(p[,s]) | DECIMAL(p[,s]) | NUMERIC(p[,s]) ) CAST(expr AS DOUBLE) CAST(expr AS MONEY | SMALLMONEY) CAST(expr AS DATE) CAST(expr AS TIME) CAST(expr AS POS...
一. SQL中的cast()函数 CAST函数用于将某种数据类型的表达式显式转换为另一种数据类型。CAST()函数的参数是一个表达式,它包括用AS关键字分隔的源值和目标数据类型。 1. 语法: CAST (expression AS data_type) 参数说明: expression:任何有效的SQServer表达式。
UNSIGNED [INTEGER]:产生一个无符号的BIGINT值。 使用说明 在使用CAST函数进行数据类型转换时,支持以下情况: 当用户试图进行不可能的转换,OceanBase 数据库将显示一条错误信息。如果转换时没有指定数据类型的长度,则使用 OceanBase 数据库系统内部最大长度。例如VARCHAR是 262,143 字节,NUMBER是 65 比特位的浮动精度。
SELECTCAST({fn PI()}AsINTEGER)AsIntegerPi,CAST({fn PI()}AsSMALLINT)AsSmallIntPi,CAST({fn PI()}AsDECIMAL)AsDecimalPi,CAST({fn PI()}AsNUMERIC)AsNumericPi,CAST({fn PI()}AsDOUBLE)AsDoublePi image.png 注意,在下面的例子中,精度和比例值被解析,但不会改变CAST返回的值: ...
Additional CAST or CONVERT required in any assignment statement DECLARE @IntegerVariable AS INT SET @IntegerVariable = CAST(dbo.TRY_CAST(123, 'INT', DEFAULT) AS INT) SELECT @IntegerVariable GO IF OBJECT_ID('tempdb..#temp') IS NOT NULL DROP TABLE #temp CREATE TABLE #temp ( Id INT ...
Obviously this wont work (A character to numeric conversion process failed) as they cannot be compared as is, but how do I get them to work? I have tried SELECT*FROMtable1WHEREcolumn1IN(SELECTCAST(column2ASINTEGER)FROMtable2) and
a mixed numeric-and-integer expression as numeric; there is no built-in knowledge about that. 因此,建议谨慎使用AS IMPLICIT。建议使用AS IMPLICIT的CAST应该是非失真转换转换,例如从INT转换为TEXT,或者int转换为numeric。 而失真转换,不建议使用as implicit,例如numeric转换为int。 It is wise to be conserv...