syntaxsql コピー ALTER TABLE { database_name.schema_name.table_name | schema_name.table_name | table_name } { ALTER COLUMN column_name { [ type_schema_name. ] type_name [ ( { precision [ , scale ] } ) ] [ COLLATE collation_name ] [ NULL | NOT NULL ] } | ALTER INDEX inde...
rename_table_partitionUse the rename_table_partition clause to rename a table partition or subpartition current_name to new_name. For both partitions and subpartitions, new_name must be different from all existing partitions and subpartitions of the same table. ...
4>.RENAME TABLE能将表中的数据,索引,主键定义都自动转型到新表下,但视图和对原表分配的权限不能自动转型到新表,需要手动执行 六.TRUNCATE TABLE语句 1>.查看TRUNCATE TABLE语句的帮助信息 mysql>?TRUNCATETABLEName:'TRUNCATE TABLE'Description: Syntax:TRUNCATE[TABLE]tbl_nameTRUNCATETABLEempties atablecompletely....
col_name data_typecommentrollnointNULLageintNULL#PartitionInformation # col_name data_typecommentageintNULL>ALTERTABLEStudentRENAMETOStudentInfo;-- After Renaming the table>DESCRIBEStudentInfo; col_name data_typecommentrollnoage#PartitionInformation # col_name data_typecommentageintNULL-- RENAME par...
* SQL Server * SQL 托管实例 语法 syntaxsql复制 ALTERDATABASEdatabase_name{<add_or_modify_files>|<add_or_modify_filegroups>}<add_or_modify_files>::={ADDFILE<filespec>[ ,...n ] [TOFILEGROUP{filegroup_name} ] |ADDLOGFILE<filespec>[ ,...n ] |REMOVEFILElogical_file_name|MODIFYFILE<fil...
the syntax description in filespec Oracle9i Database Reference for information on dynamic performance views ADD [STANDBY] LOGFILE MEMBER Clause Use the ADD LOGFILE MEMBER clause to add new members to existing redo log file groups. Each new member is specified by 'filename'. If the file alread...
SQL Server有两种类型的文件组:· 主文件组:包含主数据文件和任何没有明确分配给其他文件组的其他文件。系统表的所有页均分配在主文件组中。·用户定义文件组:用户定义文件组是通过在CREATE DATABASE或ALTER DATABASE语句中使用FILEGROUP关键字指定的任何文件组。
ALTER TABLE table_name { ADD COLUMN clause | ALTER COLUMN clause | DROP COLUMN clause | RENAME COLUMN clause } ADD COLUMN 子句 JDBC 数据源不支持此子句。 向表添加一列或多列,或将字段添加到 Delta Lake 表中的现有列。 备注 向现有 Delta 表添加列时,无法定义 DEFAULT 值。 对于现有...
sp_rename (Transact-SQL) CREATE TABLE (Transact-SQL) DROP TABLE (Transact-SQL) sp_help (Transact-SQL) ALTER PARTITION SCHEME (Transact-SQL) ALTER PARTITION FUNCTION (Transact-SQL) EVENTDATA (Transact-SQL) 其他资源 创建和修改表 对发布数据库进行架构更改 ...
Syntax for ALTER TABLE ALTER TABLE table-name 1ADDCOLUMNcolumn-definitionALTERCOLUMNcolumn-alterationRENAME COLUMNsource-column-nameTOtarget-column-nameDROPCOLUMNcolumn-nameRESTRICTADD PERIODFORperiod-definitionADDunique-constraintreferential-constraintcheck-constraint4DROPRPRIMARY KEYUNIQUEFOREIGN KEYCHECKCONSTRAINT...