Altering a column definition change data type * change column size * collation Altering a table definition DATA_COMPRESSION * SWITCH PARTITION * LOCK ESCALATION * change tracking Disabling and enabling constraints and triggers CHECK * NO CHECK * ENABLE TRIGGER * DISABLE TRIGGER Online operations ONLIN...
QueryStoreMaxStorageSizeOption QueryStoreOption QueryStoreOptionKind QueryStoreSizeCleanupPolicyOption QueryStoreSizeCleanupPolicyOptionKind QueryStoreTimeCleanupPolicyOption QueueDelayAuditOption QueueExecuteAsOption QueueOption QueueOptionKind QueueProcedureOption QueueStatement QueueStateOption QueueValueOption QuoteType...
[name], 0 FROM ['+ @dbname +'].sys.filegroups WHERE [type] = ''FG'' AND is_read_only = 0;'INSERTINTO#tmpfgs EXEC (@query)UPDATE#tmpdbsSETisdone =1WHERE[dbid] = @dbidEND; IF (SELECTCOUNT(ID)FROM#tmpfgs) >0BEGINWHILE(SELECTCOUNT(id)FROM#tmpfgsWHEREisdone =0) >0BEGINSELECT...
[name], 0 FROM ['+ @dbname +'].sys.filegroups WHERE [type] = ''FG'' AND is_read_only = 0;'INSERTINTO#tmpfgs EXEC (@query)UPDATE#tmpdbsSETisdone =1WHERE[dbid] = @dbidEND; IF (SELECTCOUNT(ID)FROM#tmpfgs) >0BEGINWHILE(SELECTCOUNT(id)FROM#tmpfgsWHEREisdone =0) >0BEGINSELECT...
ALTERTABLEt2CHANGECOLUMNd cINT; 修改表tbl1中列col1的名称为col2。 obclient>CREATETABLEtbl1(col1 VARCHAR2(10));Query OK,0rowsaffected obclient>ALTERTABLEtbl1RENAMECOLUMNcol1TOcol2;Query OK,0rowsaffected obclient>DESCRIBEtbl1;+---+---+---+---+---+---+|FIELD|TYPE|NULL|KEY|DEFAULT|...
[FIRST | AFTER column_name]将新增的列作为表的第一列或在column_name列之后。 目前,OceanBase 数据库仅支持在ADD COLUMN语法中设置列的位置。 CHANGE [COLUMN]修改列名和列定义,仅支持增加特定字符数据类型(VARCHAR、VARBINARY、CHAR等)的长度。 MODIFY [COLUMN]修改列定义,仅支持增加特定字符数据类型(VARCHAR、VARB...
ALTER DATABASE [database_name] SET CHANGE_TRACKING = OFF; E. 啟用查詢存放區 適用於:SQL Server (從 SQL Server 2016 (13.x) 開始) 下列範例會啟用查詢存放區並設定其參數。 SQL 複製 ALTER DATABASE [database_name] SET QUERY_STORE = ON ( ...
Altering a column definition change data type * change column size * collation Altering a table definition DATA_COMPRESSION * SWITCH PARTITION * LOCK ESCALATION * change tracking Disabling and enabling constraints and triggers CHECK * NO CHECK * ENABLE TRIGGER * DISABLE TRIGGER Online operations ONLIN...
Oracle also waits for all running queries, fetches, and PL/SQL procedures in all instances that were initiated by users other than SYS or SYSTEM and that are not inside transactions to finish. If a query is carried out by multiple successive OCI fetches, Oracle does not wait for all ...
For more information that describes when to use synchronous or asynchronous statistics updates, see the section "Using the Database-Wide Statistics Options" in Using Statistics to Improve Query Performance. <change_tracking_option>::= Controls change tracking options. You can enable change tracking, ...