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Statistics on the dictionary tables will be maintained via the automatic statistics gathering job run during the nightly maintance window.

If you choose to switch off the automatic statistics gathering job for your main application schema consider leaving it on for the dictionary tables.

CREATE TABLE secustomerorder AS (SELECT customer#, state, ISBN, category, quantity, cost, retail, FROM customers NATURAL JOIN orders NATURAL JOIN orderitems NATURAL JOIN books WHERE state IN(‘FL’,’GA’,’AL’)); VALUES(&var1,&var2); EXAMPLE: INSERT INTO EMP(empno,empnm,sal) values(1,`Punam’,9000); INSERT INTO EMP VALUES(1,`Punam’,9000); INSERT INTO EMP VALUES(&empno,`&empnm’,&sal); INSERT INTO EMP VALUES(&no,`&nm’,&sal); INSERT INTO EMP VALUES(&X,`&Y’,&Z); NOTE: After the ‘&’ sign it is not compulsory to use only column name to take the user input. ] [ORDER BY [ASC|DESC; SELECT (column_nm,…..) FROM tablenm; Select empno,empnm from emp; SELECT * FROM tablename; Select * from emp; SELECT * FROM tablename WHERE conditions; Select * from emp where salary CREATE TABLE tablename(col_nm,col_nm…) AS SELECT col_nm,col_nm FROM tablename; EXAMPLEs: 1) CREATE TABLE emp_temp(eno,enm) AS SELECT emp_no,emp_nm FROM emp; 2) CREATE TABLE emp_temp AS SELECT emp_no,emp_nm FROM emp; 3) CREATE TABLE emp_temp AS SELECT * from emp; 4) CREATE TABLE emp_temp AS SELECT * FROM emp Where salary INSERT INTO tablename(col_nm,col_nm,….) SELECT col_nm,col_nm… insert into emp_copy(eno,enm) select eno,enm from emp; insert into emp_copy select * from emp; ALTER TABLE tablename ADD (new_colnm datatype(size),…..); ALTER TABLE tablename MODIFY(colnm new_datatype(new_size),…..); Eg.

A common missconception seems to be that grid is just the new name for RAC (having improved RAC) This is not the case. One will be able to install 10g with RAC only, with grid only, without either and with both.

Here is an example: by default, which disallows statistics collection for fixed data dictionary tables (e.g., x$tables).

Oracle suggests that you analyze fixed tables only once during a typical system workload.

Rather, the Oracle10g automation features are aimed at shops that do not have the manpower or expertise to manually perform the tasks.

Oracle Enhancements by Oracle Release New Utilities in Oracle10g release 10.1.0: Oracle10g Grid RAC enhanced for Oracle10g dynamic scalability with server blades SQLTuning Advisor SQLAccess Advisor Rolling database upgrades (using Oracle10g RAC) dbms_scheduler package replaces dbms_job for scheduling Set Database Default Tablespace syntax Rename Tablespace command Introduced RECYCLEBIN command for storing objects before they are dropped. sqlplus / as sysdba accessibility without quote marks SYSAUX tablespace Multiple Temporary Tablespaces supported to reduce stress on sorting in TEMP RMAN introduces compression for backups New drop database syntax New alter database begin backup syntax and alter database end backup.

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The default value for dynamic sampling in 9i was 1.

This means the Optimizer will no longer operate under RULE mode (RBO) when a table has no statistics.

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