#VIRTUAL

ORA-54037: table must have at least 1 column that is not virtual

文档解释ORA-54037:tablemusthaveatleast1columnthatisnotvirtualCause:Anattemptwasmadetocreateatablewithonlyvirtualcolumns.Action:Includeatleast1columnthatisnotvirtual...
IT技术学习 ·2023-07-08

ORA-54038: Virtual column cannot be encrypted

文档解释ORA-54038:VirtualcolumncannotbeencryptedCause:Anattemptwasmadetocreateoralteravirtualcolumntohaveencryption.Action:Encryptionisunnecessaryforavirtualcolumna...

ORA-06953: Not enough virtual memory

文档解释ORA-06953:NotenoughvirtualmemoryCause:Notenoughmemoryavailable.Action:CheckVMSprocessquotasand/orsysgenparametersORA-06953错误是Oracle数据库在系统没有足够的虚拟内存时报出的错误。官方解...

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 ·2023-06-20

MySQL Error number: 3103; Symbol: ER_UNSUPPORTED_ALTER_INPLACE_ON_VIRTUAL_COLUMN; SQLSTATE: HY000

文档解释Errornumber:3103;Symbol:ER_UNSUPPORTED_ALTER_INPLACE_ON_VIRTUAL_COLUMN;SQLSTATE:HY000Message:INPLACEADDorDROPofvirtualcolumnscannotbecombinedwithotherALTERT...
IT技术学习 ·2023-06-19

MySQL Error number: 3733; Symbol: ER_FK_CANNOT_USE_VIRTUAL_COLUMN; SQLSTATE: HY000

文档解释Errornumber:3733;Symbol:ER_FK_CANNOT_USE_VIRTUAL_COLUMN;SQLSTATE:HY000Message:Foreignkey‘%s’usesvirtualcolumn‘%s’whichisnotsupported...
IT技术学习 ·2023-06-17

MySQL Error number: 3178; Symbol: ER_UNSUPPORTED_ALTER_ONLINE_ON_VIRTUAL_COLUMN; SQLSTATE: HY000

文档解释Errornumber:3178;Symbol:ER_UNSUPPORTED_ALTER_ONLINE_ON_VIRTUAL_COLUMN;SQLSTATE:HY000Message:ADDCOLUMNcol…VIRTUAL,ADDINDEX(col)错误说明:ER_UNSUPPORTED_ALTE...
IT技术学习 ·2023-06-17

MySQL Error number: 3174; Symbol: ER_CANNOT_ADD_FOREIGN_BASE_COL_VIRTUAL; SQLSTATE: HY000

文档解释Errornumber:3174;Symbol:ER_CANNOT_ADD_FOREIGN_BASE_COL_VIRTUAL;SQLSTATE:HY000Message:Cannotaddforeignkeyonthebasecolumnofindexedvirtualcolumn.错误说明MySQL错误317...
IT技术学习 ·2023-06-17

new、virtual、override、abstract 等-隐藏与覆盖实际操作

new、virtual、override、abstract等-重载new、virtual、override、abstract等-隐藏new、virtual、override、abstract等-覆盖(改写、重写)new、virtual、override、abstract等-抽象new、virtual、override、...

C# 类、多态、继承之 virtual、new 可用于属性、字段、静态吗?

C# 类中,virtual 可以用于属性,但不能用于字段、静态。protectedvirtualstringP1{get;set;}//可protectedvirtualstaticstringP2{get;set;}//不可protectedvirtualstringF1="F1";//不可pro...

virtual、override、new 可以作用于哪些成员?

virtual、override 作用于属性、方法。new 除了作用于属性、方法,还可作用于字段、静态字段、常量。比如以下代码是正确的:publicclassB{protectedconststringS="b";//常量publicvirtualvoidPrint(){MessageBox.Sho...

new、virtual、override、abstract 等-抽象

new、virtual、override、abstract等-重载new、virtual、override、abstract等-隐藏new、virtual、override、abstract等-覆盖(改写、重写)new、virtual、override、abstract等-抽象new、virtual、override、...

new、virtual、override、abstract 等-覆盖(改写、重写)

new、virtual、override、abstract等-重载new、virtual、override、abstract等-隐藏new、virtual、override、abstract等-覆盖(改写、重写)new、virtual、override、abstract等-抽象new、virtual、override、...

new、virtual、override、abstract 等-隐藏

new、virtual、override、abstract等-重载new、virtual、override、abstract等-隐藏new、virtual、override、abstract等-覆盖(改写、重写)new、virtual、override、abstract等-抽象new、virtual、override、...

new、virtual、override、abstract 等-重载

new、virtual、override、abstract等-重载new、virtual、override、abstract等-隐藏new、virtual、override、abstract等-覆盖(改写、重写)new、virtual、override、abstract等-抽象new、virtual、override、...
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