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Oracle SQL Plus The Definitive Guide- P48

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Oracle SQL Plus The Definitive Guide- P48:Every day, computer professionals the world over wake up, travel to the office, sit down in front of a computer, and begin another day working with that database called Oracle. Programmers write queries and stored procedures. Database administrators monitor performance, make database changes, and perform other maintenance tasks. Operations people may need to back up or recover a database. | previous page page_433 next page Page 433 ON Turns on printing of page footers. The default footer if you do not specify another will be the first part of the SELECT statement. COLx Causes any footer text following this parameter to print at the specified column position. S KIP x May be abbreviated to S and inserts the specified number of line breaks before printing any subsequent footer text. TABx TAB is similar to COL but moves you the specified number of columns relative to the current position. Negative numbers move you backwards. TAB has nothing whatsoever to do with tab characters. LE FT May be abbreviated LE and causes subsequent footer text to be printed beginning at the leftmost column of the current footer line. CE NTER May be abbreviated CE and causes subsequent footer text to be centered within the current line. The LINESIZE setting controls the line width. R IGHT May be abbreviated R and causes subsequent footer text to be printed flush right. The LINESIZE setting controls where SQL Plus thinks the right end of the line is. BOLD Makes your footer bold by printing it three times. Only title text following the BOLD command is repeated on each line. There is not a NOBOLD parameter. FOR MAT May be abbreviated to FOR and allows you to control how subsequent numeric data in the footer is displayed. formatspec Is a string that specifies the display format to use for subsequent numeric data in the footer. The format elements you can use here are the same as for the COLUMN command and are described in Appendix B. It is possible to specify a character format such as A20 but that has no effect on subsequent character strings. text Is any text you want to have in the footer. To be safe you should enclose this in quotes but you don t have to as long as your title text doesn t include any previous page page_433 next page previous page page_434 next page Page 434 variable May be one of the variables shown in Table A-1. Table A-1. SQL Plus System Variables System .