lex主题的文章列表，还有lex的技术要点_第2页

ORA-12015: cannot create a fast refresh materialized view from a complex query

文档解释ORA-12015:cannotcreateafastrefreshmaterializedviewfromacomplexqueryCause:NeitherROWIDsandnorprimarykeyconstraintsaresupportedforcomplexqueries.Action:Reissu...

IT技术学习 ·2023-07-11

ORA-00251: LOG_ARCHIVE_DUPLEX_DEST cannot be the same destination as string string

文档解释ORA-00251:LOG_ARCHIVE_DUPLEX_DESTcannotbethesamedestinationasstringstringCause:ThedestinationspecifiedbytheLOG_ARCHIVE_DUPLEX_DESTparameteristhesameasthedes...

IT技术学习 ·2023-07-09

ORA-16019: cannot use string with LOG_ARCHIVE_DEST or LOG_ARCHIVE_DUPLEX_DEST

文档解释ORA-16019:cannotusestringwithLOG_ARCHIVE_DESTorLOG_ARCHIVE_DUPLEX_DESTCause:Oneofthefollowingeventscausedanincompatibility:1)ParameterLOG_ARCHIVE_DESTorLOG_...

IT技术学习 ·2023-07-09

ORA-01052: required destination LOG_ARCHIVE_DUPLEX_DEST is not specified

文档解释ORA-01052:requireddestinationLOG_ARCHIVE_DUPLEX_DESTisnotspecifiedCause:AvaliddestinationforparameterLOG_ARCHIVE_DUPLEX_DESTwasnotspecifiedwhenparameterLOG_...

IT技术学习 ·2023-07-08

ORA-25164: The tag expression is too complex.

文档解释ORA-25164:Thetagexpressionistoocomplex.Cause:Thestatementtagvaluewasnotspecifiedusingasimpleexpression.Action:Reducethecomplexityofthestatementtagexpression...

IT技术学习 ·2023-07-08

ORA-13350: two or more rings of a complex polygon touch

文档解释ORA-13350:twoormoreringsofacomplexpolygontouchCause:Theinnerorouterringsofacomplexpolygontouch.Action:Allringsofacomplexpolygonmustbedisjoint.Correctthegeom...

IT技术学习 ·2023-07-08

ORA-55309: hash collision resolution failed for lexical value string

文档解释ORA-55309:hashcollisionresolutionfailedforlexicalvaluestringCause:Attemptstoresolvehashcollisionexceededthemaximumretrycount.Action:Thismaybeaninternalerror...

IT技术学习 ·2023-07-06

ORA-13351: two or more rings of a complex polygon overlap

文档解释ORA-13351:twoormoreringsofacomplexpolygonoverlapCause:Theinnerorouterringsofacomplexpolygonoverlap.Action:Allringsofacomplexpolygonmustbedisjoint.Correctthe...

IT技术学习 ·2023-07-05

Python complex()

复杂函数在python中有两种用法。两个数字可以作为参数给出，函数返回一个复数。它也可以用来将字符串转换成复数**complex(real,imaginary)**#whererealistherealpartandimaginaryisimaginarypartofthecomplexnumber复变函数可以将数字作...

php学习 ·2023-04-09

Bulma基于Flexbox布局技术开源现代CSS框架

Bulma是一个基于Flexbox布局技术的免费、开源的现代CSS框架，它提供了易于使用的前端的组件，您可以轻松地组合这些组件来构建响应式Web界面。官方网址：https://bulma.bootcss.com/源码下载地址：https://github.com/jgthms/bulma/releases/downlo...

开发笔记 ·2023-03-13

前端布局：Flex弹性布局使用及说明

CSS中的flexbox生来就是为了布局而生的，使用它能使许多布局布局变得简单。典型的三栏式布局、垂直水平居中布局，使用的是传统的浮动法、定位法，代码相对复杂难懂，如果使用flexbox就会变得很简单。Flex布局的主要思想是使父元素能够调节子元素的高度、宽度和排布的顺序，从而能够最好地适应可用布局空间（能够适应不同的...

开发笔记 ·2023-03-05

org.springframework.jdbc.UncategorizedSQLException

SQLstate[99999];errorcode[17056];不支持的字符集(在类路径中添加orai18n.jar):ZHS16GBK;原因:和数据库字符集不一致解决办法:添加依赖 <!--https://mvnrepository.com/artifact/com.oracle.database....

代码星球 ·2021-02-23

表情存储异常--mybatis抛出异常（java.sql.SQLException: Incorrect string value: 'xF0x9Fx92x94' for column 'name' at row 1）

文章参考 https://blog.csdn.net/junsure2012/article/details/42171035https://www.cnblogs.com/WangYunShuaiBaoLe/p/9055215.htmlhttps://www.jb51.net/article/112879....

代码星球 ·2021-02-23

ThreadPoolExecutor 杂记

Whenanewtaskissubmittedinmethodexecute(Runnable),andfewerthancorePoolSizethreadsarerunning,anewthreadiscreatedtohandletherequest,evenifotherworkerthreadsareidle...

代码星球 ·2021-02-21

ThreadPoolExecutor 异常

通过execute提交的任务，能将该任务抛出的异常交给未捕获异常处理器处理，而通过submit提交的任务，无论是抛出的未检查异常还是已检查异常，都将被认为是任务返回状态的一部分。如果一个由submit提交的任务由于抛出了异常而结束，那么这个异常将被Future.get封装在ExecutionException中重新抛出...

代码星球 ·2021-02-21