命中索引且含 in expr 时,在特定的场景下会导致查询返回的结果集不对。出现该 BUG 需满足 WHERE 条件中含 4 个及以上索引列,且: 第一个列是等值谓词。 第二个列是范围谓词。 第三个列是 in 表达式。 第四个列是任意谓词。 其中,第 1 个条件可是 1 或多个等值谓词,第 2 个条件后也可跟着 0 或多...
从Power Query Online 连接到本地 Oracle 数据库 若要建立连接,请执行以下步骤: 安装和设置本地数据网关。 在Power Query Online 中,选择数据源选择中的Oracle 数据库选项。 在出现的 Oracle Database对话框中,指定要在“服务器”中连接到的 Oracle net 服务名称/TNS 别名、Easy Connect Plus 连接字符串或连接描...
论文给出了引入Database In-Memory后,查询优化器的扩展,具体包括统: statistics, cost model, query transformation, access path 和 join 优化, parallelism, 以及 cluster-awareness优化。 Oracle Database in-memory 这里仅是简述下Oracle DBIM(db in memory),详细介绍见Oracle Database In-Memory with Oracle Da...
Oracle Database PostgreSQL SAP ERP SharePoint SQL Server Teradata 桌面流程 使用Microsoft Entra ID 的 HTTP 故障排除 當您嘗試使用內部部署數據源發佈數據流時,可能會遇到下列 MashupException 錯誤: M複製 AzureDataLakeStorage failed to get the response:'The underlying connection was closed: An unexpecte...
What data types are returned? How long are the strings in each column returned? Systems might have very small default and benefit from tuning. For example: Oracle’s defaultfetchSizeis 10. Increasing it to 100 reduces the number of total queries that need to be executed by a factor of 10...
Oracle Database includes a powerful array of query optimization features that maximize performance and allow DBAs to become more productive by providing innovation in plan stability.
Execute_Query command is used to fetch all the records for current database data block in Oracle Forms, actually its executes query in current data block. Syntax EXECUTE_QUERY; Clears the current block, opens a query, and fetches a number of selected records. ...
In addition, if you are new to Oracle Data Miner, we strongly suggested that you complete the Using Oracle Data Miner 4.1 tutorial. What Do You Need? Have access to or have Installed the following: Oracle Database: Minimum: Oracle Database 12c Enterprise Edition, Release 1.0.2 (12.1.0.2....
Oracle Database - Enterprise Edition - Version 12.1.0.2 and later: ORA-600: [KGL-heap-size-exceeded] And Concurrency Issues After Failure To Compile An Invalid AFTER
Oracle Provider for OLE DB - Version 9.2.0.8 and later: ORA-12560 Attempting to Query the Oracle Database From Microsoft SQL Server's SQL Query Analyzer Using the Or