Rain主题的文章列表，还有Rain的技术要点_第9页

MySQL Error number: 3823; Symbol: ER_CHECK_CONSTRAINT_CLAUSE_USING_FK_REFER_ACTION_COLUMN; SQLSTATE: HY000

文档解释Errornumber:3823;Symbol:ER_CHECK_CONSTRAINT_CLAUSE_USING_FK_REFER_ACTION_COLUMN;SQLSTATE:HY000Message:Column‘%s’cannotbeusedinacheckconstraint&#...

IT技术学习 ·2023-06-21

MySQL Error number: 3817; Symbol: ER_CHECK_CONSTRAINT_ROW_VALUE; SQLSTATE: HY000

文档解释Errornumber:3817;Symbol:ER_CHECK_CONSTRAINT_ROW_VALUE;SQLSTATE:HY000Message:Checkconstraint‘%s’cannotrefertoarowvalue.。错误说明：ER_CHECK_CONSTRAINT_...

IT技术学习 ·2023-06-20

MySQL Error number: 3819; Symbol: ER_CHECK_CONSTRAINT_VIOLATED; SQLSTATE: HY000

文档解释Errornumber:3819;Symbol:ER_CHECK_CONSTRAINT_VIOLATED;SQLSTATE:HY000Message:Checkconstraint‘%s’isviolated.错误说明MySQL错误3819（ER_CHECK_CONSTRAINT_VIO...

IT技术学习 ·2023-06-20

MySQL Error number: 3175; Symbol: ER_CANNOT_CREATE_VIRTUAL_INDEX_CONSTRAINT; SQLSTATE: HY000

文档解释Errornumber:3175;Symbol:ER_CANNOT_CREATE_VIRTUAL_INDEX_CONSTRAINT;SQLSTATE:HY000Message:Cannotcreateindexonvirtualcolumnwhosebasecolumnhasforeignconstraint....

IT技术学习 ·2025-01-29

MySQL Error number: 3812; Symbol: ER_NON_BOOLEAN_EXPR_FOR_CHECK_CONSTRAINT; SQLSTATE: HY000

文档解释Errornumber:3812;Symbol:ER_NON_BOOLEAN_EXPR_FOR_CHECK_CONSTRAINT;SQLSTATE:HY000Message:Anexpressionofnon-booleantypespecifiedtoacheckconstraint‘%sR...

IT技术学习 ·2025-01-28

MySQL Error number: 3959; Symbol: ER_DEPENDENT_BY_CHECK_CONSTRAINT; SQLSTATE: HY000

文档解释Errornumber:3959;Symbol:ER_DEPENDENT_BY_CHECK_CONSTRAINT;SQLSTATE:HY000Message:Checkconstraint‘%s’usescolumn‘%s’,hencecolumncannotbe...

IT技术学习 ·2025-01-28

MySQL Error number: 3818; Symbol: ER_CHECK_CONSTRAINT_REFERS_AUTO_INCREMENT_COLUMN; SQLSTATE: HY000

文档解释Errornumber:3818;Symbol:ER_CHECK_CONSTRAINT_REFERS_AUTO_INCREMENT_COLUMN;SQLSTATE:HY000Message:Checkconstraint‘%s’cannotrefertoanauto-incrementc...

IT技术学习 ·2025-01-28

MySQL Error number: 3815; Symbol: ER_CHECK_CONSTRAINT_FUNCTION_IS_NOT_ALLOWED; SQLSTATE: HY000

文档解释Errornumber:3815;Symbol:ER_CHECK_CONSTRAINT_FUNCTION_IS_NOT_ALLOWED;SQLSTATE:HY000Message:Anexpressionofacheckconstraint‘%s’containsdisallowedfu...

IT技术学习 ·2025-01-28

MySQL Error number: 3546; Symbol: ER_CANT_SET_GTID_PURGED_DUE_SETS_CONSTRAINTS; SQLSTATE: HY000

文档解释Errornumber:3546;Symbol:ER_CANT_SET_GTID_PURGED_DUE_SETS_CONSTRAINTS;SQLSTATE:HY000Message:@@GLOBAL.GTID_PURGEDcannotbechanged:%s。错误说明：ER_CANT_SET_GTID_PURG...

IT技术学习 ·2025-01-28

MySQL Error number: 3816; Symbol: ER_CHECK_CONSTRAINT_VARIABLES; SQLSTATE: HY000

文档解释Errornumber:3816;Symbol:ER_CHECK_CONSTRAINT_VARIABLES;SQLSTATE:HY000Message:Anexpressionofacheckconstraint‘%s’cannotrefertoauserorsystemvariable...

IT技术学习 ·2025-01-28

IDEA(jetbrain通用)优雅级使用教程（转）

文章转自 http://www.jianshu.com/p/3160ff832a9b/前面写过一篇IDEA的入门级文章，但是只学会了那些配置啊什么的并不能提高我们的开发效率。事实上，如果你IDEA用的足够熟练，就可以把鼠标扔了。附入门级教程传送门：http://www.jianshu.com/p/0e2bf6...

代码星球 ·2021-02-23

Constraint where both columns cannot be null, but one can

ALTERTABLETableAADDCONSTRAINTCK_BothDepartsNotNullCHECK(departAISNOTNULLORdepartBISNOTNULL) ...

代码星球 ·2021-02-21

Jetbrain的CLion激活方法

Jetbrain的CLion是一款c，cpp的付费ide，智能提示不错。下载地址：https://www.jetbrains.com/clion/安装完成后，激活时选择Licenseserver，接着输入http://idea.imsxm.com/点击Active(激活)即可。暂时不知道能不能激活Jetbrain的其它...

代码星球 ·2021-02-20

Unable to import maven project: See logs for details org.jetbrains.idea.maven

1：报错信息及详细的日志查看方式如下图所示：2：详细的日志错误信息如下所示：2020-04-1016:18:52,904[71105]ERROR-#org.jetbrains.idea.maven-com.google.inject.CreationException:Unabletocreateinjector,se...

代码星球 ·2021-02-17

License Plate Detection and Recognition in Unconstrained Scenarios（无约束场景下的车牌检测与识别）

0摘要：尽管自动车牌识别（ALPR）的商业和学术方法数量众多，但大多数现有方法都集中在特定车牌（LP）区域（例如欧洲，美国，巴西，中国台湾等），并且经常探索包含近似正面图像的数据集。本文提出了一个完整的ALPR系统，专注于无约束的场景，其中车牌图像可能由于倾斜视角而存在严重的失真。我们的主要贡献是引入了一种新颖的卷积神...

代码星球 ·2021-02-16