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C语言toupper()函数：将字符转换成大写

头文件和函数原型#include<ctype.h>inttoupper(intc);C描述toupper()是C语言标准库中的一个函数，用于将一个字符转换成对应的大写形式；返回值如果传入的字符参数是一个小写字母，toupper()函数会返回其对应的大写字母；如果参数不是小写字母，则原封不动的返回；这个示例将...

开发笔记 ·2024-08-23

PHP简单实现图片格式转换(jpg转png，gif转png等)

依赖php扩展gd和exif实现/***图片格式转换*@paramstring$image_path文件路径或url*@paramstring$to_ext待转格式，支持png,gif,jpeg,wbmp,webp,xbm*@paramnull|string$save_path存储路径，null则返回二进制内容，str...

开发笔记 ·2024-07-01

十进制转换成二进制的方法

将十进制数转换为二进制数的方法如下：1.除以2取余数法：从右向左依次除以2，每次取余数。直到商为0为止。将取得的余数倒序排列，即为十进制数的二进制表示。举例说明：将十进制数27转换为二进制数：27÷2=13余113÷2=6余16÷2=3余03÷2=1余11&div...

开发笔记 ·2024-01-09

java把字符串转换成日期格式

publicstaticvoidmain(String[]args)throwsException{Datedate=newSimpleDateFormat("yyyy-MM-dd").parse("2005-06-09");Stringnow=newSimpleDateFormat("yyyy年MM月dd日").fo...

开发笔记 ·2024-01-08

ORA-14657: cannot cascade row migration to reference-partitioned child table

文档解释ORA-14657:cannotcascaderowmigrationtoreference-partitionedchildtableCause:Updateofaparentkeymayrequiremigrationofrowsinreference-partitionedchildtables,howe...

IT技术学习 ·2023-07-26

ORA-22346: Type has cyclical dependency. Should use CASCADE option

文档解释ORA-22346:Typehascyclicaldependency.ShoulduseCASCADEoptionCause:Anattemptwasmadetoalteratypewhichhasacyclicaldependency,withinvalidateoption.Action:GiveCASC...

IT技术学习 ·2023-07-26

ORA-24121: both cascade and a block range passed to DBMS_REPAIR.CHECK_OBJECT procedure

文档解释ORA-24121:bothcascadeandablockrangepassedtoDBMS_REPAIR.CHECK_OBJECTprocedureCause:BothcascadeandablockrangewerespecifiedinacalltoDBMS_REPAIR.CHECK_OBJECT.Ac...

IT技术学习 ·2023-07-22

ORA-55504: Transaction conflicts in NOCASCADE mode

文档解释ORA-55504:TransactionconflictsinNOCASCADEmodeCause:Transactionsotherthantheonesspecifiedconflictswiththespecifiedtransactions.Action:Tryusingotheroptionslik...

IT技术学习 ·2023-07-18

ORA-22338: must specify CASCADE INCLUDING DATA when altering the final property

文档解释ORA-22338:mustspecifyCASCADEINCLUDINGDATAwhenalteringthefinalpropertyCause:Anattemptwasmadetoalterthefinalpropertyofatypewithdependenttable(s)withoutspecify...

IT技术学习 ·2023-07-16

ORA-24126: invalid CASCADE_FLAG passed to DBMS_REPAIR.string procedure

文档解释ORA-24126:invalidCASCADE_FLAGpassedtoDBMS_REPAIR.stringprocedureCause:CASCADE_FLAGwasspecifiedforanobjectthatisnotatable.Action:UseCASCADE_FLAGonlyfortables...

IT技术学习 ·2023-07-13

ORA-25961: join index prevents dml cascade constraint operation

文档解释ORA-25961:joinindexpreventsdmlcascadeconstraintoperationCause:Anattempttoexecutedmlresultedintheneedtoperformdmlonanothertablebecauseofacascadeconstraint.Th...

IT技术学习 ·2023-07-08

ORA-01491: CASCADE option not valid

文档解释ORA-01491:CASCADEoptionnotvalidCause:TheCASCADEoptionisonlyvalidfortablesorclusters.Action:DonotspecifyCASCADE官方解释该错误消息通常指出您使用了CASCADE字句，该字句不支持UTL_FILE包中的存储...

IT技术学习 ·2023-07-08

ORA-38811: need CASCADE option to drop edition that has actual objects

文档解释ORA-38811:needCASCADEoptiontodropeditionthathasactualobjectsCause:Thiserroroccurredbecauseanattemptwasmadetodropaneditionthathasactualobjects.Action:Specify...

IT技术学习 ·2025-02-06

ORA-22312: must specify either CASCADE or INVALIDATE option

文档解释ORA-22312:mustspecifyeitherCASCADEorINVALIDATEoptionCause:AnattemptwasmadetoalteratypewhichhasadependenttypeortablewithoutspecifyingtheCASCADEorINVALIDATEop...

IT技术学习 ·2025-01-31

ORA-01981: CASCADE CONSTRAINTS must be specified to perform this revoke

文档解释ORA-01981:CASCADECONSTRAINTSmustbespecifiedtoperformthisrevokeCause:Duringthisrevokesomeforeignkeycontraintswillberemoved.Inordertoperformthisautomatically,...

IT技术学习 ·2025-01-28