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- Query Instructions
-
-
- The Query program will allow you to produce a report based on
- your selection, sorting and formatting specifications. Upon
- entry, you will be presented with a data dictionary and string
- gadgets for entering your record selection criteria, sort
- sequence and output report format.
-
- The data dictionary presents you with a list of data names that
- can be used to display or print values contained in the database.
-
- The Select string gadget will allow you to specify some selection
- criteria to be used to determine which database entries will be
- included in you output display or report. For example,
-
- SELECT:
- (Article = "computer" or "printer") and Orig > 1000.00
-
- specifies that the database is to be searched for any Article
- that contains the words "computer" or "printer" that also has an
- Original Cost greater than $1,000. Remember that in order to
- enter data into a string gadget you must first position the
- pointer within the gadget and depress the left button on the
- mouse. Note that the Select parameters contain parentheses to
- prevent ambiguities. If there is a possibility that the key word
- or phrase you are looking for contains occurrences with both
- upper and lower case letters, you must check for both, e.g.,
- "Computer" or "computer". Another method is to use the wild
- character, e.g., "?omputer".
-
- The Sort string gadget will allow you to specify the sequence in
- which the selected records are to be displayed or printed. For
- example,
-
- SORT:
- Article
-
- specifies that the selected database entries are to be sorted in
- Article name sequence. Only one sort field may be entered.
-
- The Report string gadget will allow you to specify the format of
- the output display or report. For example,
-
- REPORT:
- Article, col 22, Description, col 70, Orig
-
- specifies that the Article name, Description and Original cost
- for the selected records are to be displayed. Further, it is
- specified that the Description is to be displayed beginning in
- column 22 and that the Original cost is to be displayed beginning
- in column 70. The Report specification parameters may be very
- simple or very complex depending upon the skill of the user.
- Upon entering the Query program, you will find that the Report
- string gadget already contains some parameters. You may use
- these parameters or enter your customized report specifications.
- To erase the content on the Report string gadget, first select
- the gadget and then depress Right AMIGA - X. To undo (cancel)
- the last editing change to the string, depress Right AMIGA - Q.
- The Report specification parameters can be classified as either
- describing "when to do it" or "what to do".
-
- When To Do It:
-
- page_top - specifies that the following functions are to
- be executed at the top each printed page or screen.
-
- page_bottom - specifies that the following functions are
- to the executed at the bottom of each printed page or
- screen.
-
- report_top - specifies that the following functions are
- to be executed only at the beginning of the output
- report.
-
- report_bottom - specifies that the following functions
- are to executed only at the end of the report.
-
- top(<data-name>) - specifies that the following
- functions are to be executed after there has been a
- change in the content of <data-name>. For example,
- top(Article). Normally, the specified data-name will be
- the same as the sort sequence.
-
- bottom(<data-name>) - specifies that the following
- functions are to be executed before there is a change in
- the content of data-name. For example,
- bottom(Category).
-
- detail - specifies that the following functions are to
- be executed for each selected database entry.
-
- What To Do:
-
- print - specifies that all output is to be routed to the
- printer.
-
- display - specifies that all output is to be routed to
- the screen. "Display" is the output default.
-
- <data-name> - causes the specified data name to be
- printed or displayed. For example, "Condition" is a
- data-name.
-
- "literal" - causes the specified literal to be printed
- or displayed. For example, "The result is:" is a
- literal.
-
- total(<data-name>) - specifies that the summed value of
- <data-name> is to be printed or displayed. An numeric
- data item from the dictionary must be substituted for
- "<data-name>, e.g., Orig.
-
- col nn - causes the following data item to be displayed
- or printed in the column specified by nn.
-
- skip n - causes n lines to be skipped before displaying
- or printing the next data item. If n is not provided, 1
- is assumed.
-
- pause - causes a pause in the output process until a key
- (any key) is depressed.
-
- eject - if "print" has been specified, this command
- causes the paper to be ejected to the top of the next
- page; otherwise, the screen will be cleared.
-
-
- EDITING MASKS
-
- Editing Masks may be used to cause predefined characters
- to be imbedded within displayed or printed numeric
- values. The masks must be constructed as an
- alpha-numeric literal whose first character is "%". If
- the second character of the mask literal is other
- than a numeric character, that character will be placed
- in the next left most position before the resulting
- edited numeric value.
-
- Examples:
-
- Input Values Mask Output
-
- 01000 "%9,999" 1,000
-
- 25245 "%$99,999" $25,245
-
- -5643 "%$999,999" $-5,643
-
-
- Here is an example of a more complex query construction:
-
-
- SELECT:
- (Description = "gold" or "silver") and Orig >= 100
-
-
- SORT:
- Article
-
-
- REPORT:
- bottom(Article) Article total(Orig) "%$99,999" report_bottom skip
- 1 col 5 "Total " col 22 total(Orig) "%$99,999"
-
- This query will display the total original value for each article
- type and display an overall total value at the end of the report.
-
- Rules:
-
- (1) The Select statement may contain these operators:
-
- = Equal to
- <> Unequal to
- < Less than
- > Greater than
- <= Less than or equal to
- >= Greater than or equal to
-
- (2) The field on the left side of the operator must be a
- data name from the dictionary.
-
- (3) The field on the right side of the operator may be
- either a data name or literal. Literals must be enclosed in
- double quotes.
-
- (4) In the case of equal and unequal, the data name on the
- left side of the operator is searched for any occurrences of the
- data specified on the right of the operator.
-
- (5) The length of the item to the right of the operator may
- not be greater than the length of the item to the left of the
- operator.
-
- (6) When used in a literal, the "?" is wild. For example,
- to select all records in the database enter:
-
- SELECT:
- Article = "?"
-
- (7) Commas may used to improve readability; otherwise, they
- serve no useful purpose.
-
- (8) All data names must be capitalized. All other commands
- must be in lower case.
-
- If your printer carriage is 80 columns in width, try setting your
- printer preferences for compressed mode in order to print reports
- that are greater than 80 characters in width.
-