For the Oracle's cost-based optimizer (CBO) to work correctly, you need to regularly compute statistics for your tables and indexes using the Oracle-suppliedDBMS_STATSpackage or theANALYZE TABLEstatement. DB2 Explain Plan Visual explain plan is supported for DB2 versions 8.x and 9.x. It is ...
CJQ0 typically handles job queues for the older DBMS_JOB framework but also plays a part in the execution of DBMS_SCHEDULER jobs by managing the job queue and distributing jobs to job slaves (Jnnn processes) for execution. CQJ0 is related to job scheduling, specifically for Oracle's Scheduler...
SQL coding help Query 1: Which guest(s) (only list the guestNo) have stayed in both hotelNo 2 and hotelNo 4? Query 2: which hotels (only list the hotel number) do not have family rooms? Query 3: Wh What is the use of force ...
Q1)- What is the relationship between level 0 and level 1 DFD diagrams? Explain. Q2)- What does Use Case mean? and what does use case describe? Q3)- What does triggers mean in use case, and what are t Given a pipeline A of five stages, where eac...
When SQL trace is enabled for a database session, the Oracle server process handling that session writes detailed information about all database calls and operations to a trace file. Special database events may be set in order to cause Oracle to write even more specific information—such as ...
1) in normal RDBMS when user triggers a activation then all records in New table has to be compared across old records to understand its a new or old record this comparison is done at ABAP layer by fetching all records into ABAP layer. Then if the record is new then it will be insert...
Remember the logon trigger changes my current schema to APP_SCHEMA. MARTINNASH@bi20p> alter session set current_schema = martinnash; Session altered. MARTINNASH@bi20p> select * from table(dbms_xplan.display); PLAN_TABLE_OUTPUT --- --- | Id | Operation | Name | Rows | Bytes | Cost ...