To determine whether a database is in PROTECTED or UNPROTECTED mode, query the STANDBY_DATABASE column of the V$DATABASE dynamic performance view. REGISTER LOGFILE Clause Specify the REGISTER LOGFILE clause f
更改column_name 列的说明。 comment 必须为 STRING 文本。 FIRST 或AFTER 标识符 将列从当前位置移到前面(FIRST)或紧邻 AFTER 之后(identifier)。只有 table_name 为Delta 表时才支持此子句。 TYPE data_type 适用于 Databricks SQL Databricks Runtime 15.2 及更高版本 更改column_name 列的数据类型...
1. 报错如下: you have an error in your SQL syntax;check the manual that corresponds to your MySQL server version for the right syntax to use near (20,5) ADD COLUMN p10gc decimal(20,5) at line 1 1. 原因 从语句看 完全没有问题。 主要是看操作的编辑器,我用的mysql-front,原来类型关键字...
SELECT * FROM sys.dm_db_column_store_row_group_physical_stats WHERE object_id = object_id('cci_target'); 執行此命令,強制所有數據CLOSEDOPEN列群組進入數據行存放區。 SQL 複製 ALTER INDEX idxcci_cci_target ON cci_target REORGANIZE WITH (COMPRESS_ALL_ROW_GROUPS = ON); 再次執行此命令,您...
To enable or disable triggers, the triggers must be in your schema or you must have the ALTER ANY TRIGGER system privilege. Additional Prerequisites When Using Object TypesTo use an object type in a column definition when modifying a table, either that object must belong to the same schema ...
mysql> ALTER ATBLE player RENAME COLUMN age to player_name; ERROR 1064 (42000): You have an errorinyour SQL syntax; check the manual that corresponds to your MySQL server versionforthe right syntax to use near'ATBLE player RENAME COLUMN age to player_name'at line 1 ...
SELECT * FROM sys.dm_db_column_store_row_group_physical_stats WHERE object_id = object_id('cci_target'); 运行以下命令以强制所有 CLOSED 行OPEN 组进入列存储。 SQL 复制 ALTER INDEX idxcci_cci_target ON cci_target REORGANIZE WITH (COMPRESS_ALL_ROW_GROUPS = ON); 再次运行此命令,可以看到...
構文表記規則の詳細については、「Transact-SQL 構文表記規則」を参照してください。 ディスク ベース テーブルの構文 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...
Unless otherwise specified, the syntax of range partitioned tables is the same as that of column-store partitioned tables. If the number of partitions in the target partitioned table has reached the maximum (32767), partitions cannot be added. ...
If multiple ADD COLUMN clauses are specified in the same statement, at most one ADD COLUMN clause can contain a references-clause. If ALTER COLUMN SET DATA TYPE is specified, it must be specified first. 2 If ADD CLONE, DROP CLONE, RENAME COLUMN, ALTER ORGANIZATION, DROP ORGANIZATION, ADD ...