sum(bytes/(1024*1024)) total from dba_data_files group by tablespace_name) a,(select tablespace_name, round(sum(bytes/(1024*1024))) free from dba_free_space group by tablespace_name) bWHERE a.tablespace_name = b.tablespace_nameorder by "% Free"; ...
连接到外部系统,用于输出tableEnv.executeSql("CREATE TEMPORARY TABLE outputTable ... WITH ( 'connector' = ... )");// 执行SQL对表进行查询转换,得到一个新的表Table table1=tableEnv.sqlQuery
查询sys.dm_tran_top_version_generators 和sys.dm_tran_version_store 可能会非常耗费资源,因为两者都需要扫描可能很大的整个版本存储库。 sys.dm_tran_version_store_space_usage 高效且运行开销低,因为它不会浏览单个版本存储记录,而是返回每个数据库在 tempdb 中使用的聚合版本存储空间。 sys.dm_tran_active...
4138 导致SQL Server 生成一个计划,该计划不对包含 TOP、OPTION (FAST N)、IN 或 EXISTS 关键字的查询使用行目标调整。 有关详细信息,请参阅 KB2667211。从SQL Server 2016 (13.x) Service Pack 1 开始,若要在查询级别完成此操作,请添加USE HINT 'DISABLE_OPTIMIZER_ROWGOAL'查询提示,而不是使用此跟踪标志...
SELECT TOP 1 @previous_snap_time = snap_time FROM #_spin_waits WHERE snap_time < ( SELECT max(snap_time) FROM #_spin_waits ) ORDER BY snap_time DESC; --get delta in the spin locks stats SELECT TOP 10 spins_current.lock_name, (spins_current.collisions - spins_prev...
SELECTa.*FROMOPENROWSET('SQLNCLI','Server=Seattle1;Trusted_Connection=yes;','SELECT TOP 10 GroupName, Name FROM AdventureWorks2022.HumanResources.Department')ASa; BULK 参数 BULK使用行集提供程序OPENROWSET从文件读取数据。 在 SQL Server 中,可以从数据文件中读取数据,OPENROWSET而无需将数据加载到目标表中。
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Under the database compatibility level setting of 100 and higher, variable assignment isn't allowed in a statement containing a top-level UNION operator. Error 10734 is returned. To resolve the error, rewrite the query as shown in the following example. SQL Copy DECLARE @v int; SELECT @v...
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Query hints can be specified only in the top-level query, not in subqueries. When a table hint is specified as a query hint, the hint can be specified in the top-level query or in a subquery. However, the value specified...