MySQL [test]> alter table t1 modify column `id` varchar(64) not null; ERROR 1138 (22004): Invalid use of NULL value 暂不支持增加、删除、修改主键。 MySQL [test]> alter table t1 add PRIMARY KEY (`id`); ERROR 1235 (0A000): Not supported feature or function MySQL [test]> alter ...
NumberOfElements Rename RevokeDatabase UnbindDefault UnbindRule UndoDrop UpdateStatistics 方法 操作員 DatabaseDdlTriggerExecutionContext DatabaseEncryptionAlgorithm DatabaseEncryptionKey DatabaseEncryptionKeyExtender DatabaseEncryptionState DatabaseEncryptionType DatabaseEvent DatabaseEventArgs...
Oracle Database - Enterprise Edition - Version 12.1.0.2 to 12.1.0.2 [Release 12.1] Information in this document applies to any platform. Symptoms ORA-31600 encountered whenredefining a table with an index and a foreign key to a different tablespace. 1.Created a table(T1) with primary key. 2...
The nonscalar types, cursor and table, can't be specified as a parameter data type in either Transact-SQL or CLR functions. If type_schema_name isn't specified, the Database Engine looks for the scalar_parameter_data_type in the following order: The schema that contains the names of SQL...
A very common use of database partitioning is to segregate data by date. Some database systems support explicit date partitioning, which MySQL does not implement in 8.0. However, it is not difficult in MySQL to create partitioning schemes based onDATE,TIME, orDATETIMEcolumns, or based on expre...
DATABASE: Defines the tenant where the conversion tables are located (for example the TCUR* tables of the ERP currency conversion). If not specified, the conversion uses the current database METHOD : Possible values: ERP, Banking BID_ASK_TYPE :Possible values: bid, ask, mid ...
NumberOfElements 重命名 RevokeDatabase UnbindDefault UnbindRule UpdateStatistics 方法 运算符 DatabaseDdlTriggerExecutionContext DatabaseEncryptionAlgorithm DatabaseEncryptionKey DatabaseEncryptionKeyExtender DatabaseEncryptionState DatabaseEncryptionType DatabaseEvent DatabaseEventArgs...
The following values of the InfoType argument return information about the DBMS product, such as the DBMS name and version: SQL_DATABASE_NAME SQL_DBMS_NAME SQL_DBMS_VER Data Source Information The following values of the InfoType argument return information about the data source, such as cursor...
Specifies the method of an assembly to bind with the function. assembly_name must match an existing assembly in SQL Server in the current database with visibility on. class_name must be a valid SQL Server identifier and must exist as a class in the assembly. If the class has a namespace...
BIT_COUNT() Return the number of bits that are set BIT_LENGTH() Return length of argument in bits BIT_OR() Return bitwise OR BIT_XOR() Return bitwise XOR CAN_ACCESS_COLUMN() Internal use only CAN_ACCESS_DATABASE() Internal use only CAN_ACCESS_TABLE() Internal use only CAN...