TAILIEUCHUNG - ORACLE8i- P2

ORACLE8i- P2: We want information information.” Possibly you recognize these words as the primary interest of a somewhat clandestine group, and as told by a character called Number 2 to Patrick McGoohan’s character Number 6 (in the old TV show The Prisoner). Indeed, in this day, information is king, and the speedy, accurate, and reliable retrieval of this information is paramount. | 28 CHAPTER 1 ELEMENTS OF ORACLE DATABASE MANAGEMENT 3 where hiredate sysdate 4 SQL 2 2 form emp SQL c form from 2 from emp To add additional text to the SQL statement use the A command and then specify the additional text. For example A from dba_data_files as shown here SQL select empno ename 2 from emp 3 where hiredate sysdate 4 SQL 1 1 select empno ename SQL a hiredate 1 select empno ename hiredate To insert a line use the I command. SQL Plus will prompt you to insert additional test at the location of the current pointer. A SQL Plus command must be on one line only this is not true for a SQL statement . If you explicitly want to use two or more lines to express the command you must end each line with a space and then a dash - . Then you can continue the command on the next line which starts with a symbol . Here s an example Column bytes - format 999 999 999 SQL Plus also provides other features for the DBA. You can Format the output including page breaks and totals summation on columns. Control the format of specific columns including length of the output displayed in the column and whether the output wraps or not. Supply title header and footer output for your SQL statements. Clear the screen. Calculate and print summary totals of columns. All SQL Plus commands are documented in Appendix C. Please purchase PDF Split-MJe 9e n to remoyebthiSi watermark. USING ORACLE SQL J 29 PA NOTE Several database management commands have been added to SQL Plus since Oracle7 to facilitate the removal of Server Manager at some point in the future. These commands include starting up shutting down and recovering the database. Starting and stopping the database is discussed in Chapter 7. Setting up the database including starting it without using CONNECT INTERNAL is covered in Chapter 3. Database security relating to CONNECT INTERNAL is discussed in Chapter 21. TNSPING The Oracle utility called TNSPING helps you determine if your Oracle networking is set up .

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