FROM (SELECT c.*,ROW_NUMBER() OVER(ORDER BY score DESC) rn FROM stu_score c) c ,(SELECT b.stu_rank,b.money,ROW_NUMBER() OVER(ORDER BY b.stu_rank) rn FROM scholarship b , TABLE( CAST( MULTISET( SELECT NULL FROM DUAL CONNECT BY LEVEL <= b.stu_num ) AS SYS.ODCIVARCHAR2LIST ...
FROM (SELECT c.*,ROW_NUMBER() OVER(ORDER BY score DESC) rn FROM stu_score c) c ,(SELECT b.stu_rank,b.money,ROW_NUMBER() OVER(ORDER BY b.stu_rank) rn FROM scholarship b , TABLE( CAST( MULTISET( SELECT NULL FROM DUAL CONNECT BY LEVEL <= b.stu_num ) AS SYS.ODCIVARCHAR2LIST ...
Oracle:支持标准的Cast语法,同时提供了TO_NUMBER、TO_CHAR等函数。 SELECT CAST('123' AS NUMBER) FROM DUAL; SELECT TO_NUMBER('123') FROM DUAL; 六、CAST操作的注意事项和最佳实践 在使用Cast操作时,需要注意以下几点: 数据精度和范围:在将数据从一种类型转换为另一种类型时,可能会丢失精度或超出范围。例如...
cast(null as json):将NULL值转换为JSON类型。 cast(json 'null' as ...):json 'null'和null会转换成sql null。 返回值说明 返回值为转换后的目标数据类型。 如果设置了setproject odps.function.strictmode=false,则会返回字母前的数字。 如果设置了setproject odps.function.strictmode=true,则会返回错误。
SELECT ProductKey, UnitPrice,UnitPriceDiscountPct, CAST(ROUND (UnitPrice*UnitPriceDiscountPct,0) AS int) AS DiscountPrice FROM dbo.FactResellerSales WHERE SalesOrderNumber = 'SO47355' AND UnitPriceDiscountPct > .02; 結果集如下所示。輸出 複製 ProductKey UnitPrice UnitPriceDiscountPct DiscountPrice...
SELECT ProductKey, UnitPrice,UnitPriceDiscountPct, CAST(ROUND (UnitPrice*UnitPriceDiscountPct,0) AS int) AS DiscountPrice FROM dbo.FactResellerSales WHERE SalesOrderNumber = 'SO47355' AND UnitPriceDiscountPct > .02; 结果集如下。输出 复制 ProductKey UnitPrice UnitPriceDiscountPct DiscountPrice -...
( i_param TEXT ) RETURN INTEGER AS v_castasint INTEGER; BEGIN v_castasint := CASE WHEN i_param IS NULL THEN NULL -- if NULL value is provided as input WHEN TRIM(i_param) IS NULL THEN 0 -- if empty string with one or more spaces is provided ELSE TRUNC(CAST(i_param AS NUMBER)...
(i_paramTEXT)RETURNINTEGERASv_castasintINTEGER;BEGINv_castasint:=CASEWHENi_paramISNULLTHENNULL-- if NULL value is provided as inputWHENTRIM(i_param)ISNULLTHEN0-- if empty string with one or more spaces is providedELSETRUNC(CAST(i_paramASNUMBER))-- if any numeric value is providedEND;...
SELECT ProductKey, UnitPrice,UnitPriceDiscountPct, CAST(ROUND (UnitPrice*UnitPriceDiscountPct,0) AS int) AS DiscountPrice FROM dbo.FactResellerSales WHERE SalesOrderNumber = 'SO47355' AND UnitPriceDiscountPct > .02; 结果集如下。输出 复制 ProductKey UnitPrice UnitPriceDiscountPct DiscountPrice -...
cast(null as json):将NULL值转换为JSON类型。 cast(json 'null' as ...):json 'null'和null会转换成sql null。 返回值说明 返回值为转换后的目标数据类型。 如果设置了setproject odps.function.strictmode=false,则会返回字母前的数字。 如果设置了setproject odps.function.strictmode=true,则会返回错误。