Answer / shivainduja

An explain plan is a representation of the access path that
is taken when a query is executed within Oracle.

SQL> explain plan for select * from emp2;

Explained.

SQL> select * from table (DBMS_XPLAN.display);

PLAN_TABLE_OUTPUT
-------------------------------------
Plan hash value: 2941272003

--------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost
(%CPU)| Time |
--------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 15 | 570 | 3
(0)| 00:00:01 |
| 1 | TABLE ACCESS FULL| EMP2 | 15 | 570 | 3
(0)| 00:00:01 |
--------------------------------------------------------------------------

8 rows selected.

Answer / rajesh venati

this will also work.

An Explain Plan is a tool that you can use to have Oracle
explain to you how it plans on executing your query.

ex:-
SQL> set autotrace on explain
SQL> select * from emp;

Execution Plan
----------------------------------------------------------
Plan hash value: 3956160932

--------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost
(%CPU)| Time |
--------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 14 | 518 | 3
(0)| 00:00:01 |
| 1 | TABLE ACCESS FULL| EMP | 14 | 518 | 3
(0)| 00:00:01 |
--------------------------------------------------------------------------

Answer / suresh somayajula

Explain Plan determines the execution plan of SQL statement.

What is the difference between having and a where in sql?

0 Answers  

---

Define a temp table?

0 Answers  

---

How many sql are there?

0 Answers  

---

What are tables and fields in the database?

0 Answers  

---

What is sharding in sql?

0 Answers  

---

Write the sql query using dual table for below output? 1 L R --- --- ---- 1 1 1 1 2 1 1 3 1 1 1 2 1 2 2 1 3 2 1 1 3 1 2 3 1 3 3 Write a query using only Dual table with out writing any pl/sql program.

3 Answers   JPMorgan Chase,

---

what is a composite key ? : Sql dba

0 Answers  

---

What is normalization and types of normalization?

22 Answers   Etisbew, F-TEC, Microsoft, TechProcess,

---

Explain the two type of Cursors ?

8 Answers   Hi Caliber IT,

---

explain what is mysql? : Sql dba

0 Answers  

---

What is sql partition function?

0 Answers  

---

write a query to remove null following table are id name 101 dinesh null jyothi null bharathi 102 suresh null shilpha 103 prakesh null suma i want the output format like id name 101 dinesh 102 suresh 103 prakesh

3 Answers   TCS,

---