I wrote this query to find the number of purchases for which there are at least 1000 other purchases, but only if ServiceType, GST and PaymentType are the same. I was thinking of adding an index to make this query faster, I thought an bitmap index would
而由于12c中每次动态采样都需要被result cache,此时就会出现Result cache的latch争用。见Document 2002089.1High Latch Free Waits on ‘Result Cache: RC Latch’ In 12C when RESULT_CACHE_MODE = MANUAL 从上面的测试可以看出,SPD的介入应该是比较靠前的,当同一个语句再次执行的时候,如果已经缓存,就采用Statistics...
Learn how to create users, grant them privileges, and remove them in Oracle Database Manage tables with CREATE TABLE, ALTER TABLE, and DROP TABLE Learn how to write SQL queries with SELECT Fast data access: How to create and use indexes in Oracle Database Ensure data quality: Keys,...
注意:有关与性能相关的问题,请搜索 SQL Server 联机丛书中的“Optimizing Distributed Queries”(优化分布式查询)主题。 消息1 Error 7399:OLE DB provider '%ls' reported an error.%ls 打开跟踪标志 7300,或使用 SQL 事件探查器捕获“OLEDB 错误”事件,以便检索扩展的 OLEDB 错误信息。 消息2a "ORA-12154:TNS:c...
EXECUTIONS_DELTA = No of queries execution (per hour) FROM dba_hist_sqlstat dhss WHERE dhss.snap_id IN (SELECT snap_id FROM dba_hist_snapshot WHERE begin_interval_time >= TO_DATE ('&input_start_date', 'YYYYMMDD HH24:MI') AND end_interval_time <= TO_DATE ('&input_end_date', ...
recursive calls are basically SQL performed on behalf of your SQL. So, if you had to parse the query, for example, you might have had to run some other queries to get data dictionary information. These would be recursive calls. Space management, security checks, calling PL/SQL from SQL—...
Complex problems often are resolved by integrating multiple technologies. This solution explores the integration of cutting-edge AI technologies, including Cohere AI with Oracle Autonomous Database Select AI, to craft responsive SQL queries or engage in conversational interactions. With the aid of the ...
When creating a nested table of nested tables as a column in SQL, look at the syntax of the CREATE TABLE command to see how to specify the storage table. Visit our to get answers to all your queries! Collection Methods Collection methods make it easy to use collections and maintain your ...
http://www.demo1.com/index.aspx?id=1;exec sp_configure 'show advanced options',1 reconfigure;exec sp_configure 'Ad Hoc Distributed Queries',1 reconfigure 1. 本地建立临时表 create table ##version (VERSION varchar(500)) 1. 查询系统信息 ...
Note that the queries return the same values regardless of whether they are issued before or after the year 2000. The RR datetime format element lets you write SQL statements that will return the same values from years whose first two digits are different. ...