Tuning SQL statement is one of the major activities in performance tuning for every Oracle DBA. We would refer execution plan, SQL tuning advisor, SQL access advisor, Object statistics etc… to start identifying the issue with the SQL statement. In this process we often come across SQL_ID, HASH_VALUE and PLAN_HASH_VALUE details and use them for […]
Generating EXECUTION PLAN from explain plan is the best method of reading the plan that optimizer defined for executing a SQL statement in Oracle Database. There are multiple ways of generating such execution plans, one is by running EXPLAIN PLAN and other from V$SQL_PLAN. In this blog, I am going to cover in detail about […]
EXPLAIN PLAN is often used to generate execution plan of SQL statement or set of SQL statements. But we would always prefer to run EXPLAIN PLAN for each SQL statement and generate its execution plan using DBMS_XPLAN package and then pick up next SQL statement. But we can also run EXPLAIN PLAN for multiple SQL […]
