The ISTAT command summarizes the distribution of items in a file. ISTAT analyzes the structure of groups within a file and produces a file-hashing histogram that is helpful for determining whether the current file structure is the best one.
Format
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ISTAT [DICT] filename [item-list] [selection] [modifiers] [(options)] |
Parameter(s)
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DICT |
Specifies the file dictionary. |
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filename |
Name of the file. |
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item-list |
List of individual item-IDs. Enclose each item-ID in single quotes. |
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selection |
Specifies one or more conditions that an item must meet to be included in the report. For a complete description of selection expression syntax, see the LIST Command. |
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modifiers |
Include one or more keywords that specify the report format. These parameters affect headers, footers, spacing, totalling column figures, control breaks, and more. For complete information about using these keywords, see the section, Connectives, Modifiers, and Options in the INFO/ACCESS User Reference Guide. |
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options |
Include one or more single-character codes that specify the report format and direct or modify output. They must be enclosed in parentheses, can be entered in any order, and need not be separated by spaces or any delimiters such as commas. For complete information about using these parenthetical options, see the section, Connectives, Modifiers, and Options in the INFO/ACCESS User Reference Guide. |
Description
ISTAT produces a report that looks like this:
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>ISTAT CUSTOMERS FILE= CUSTOMERS MODULO= 3 17:24:06 dd mmm yyyy |
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FRAMES |
BYTES |
ITMS |
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1 |
270 |
10 *>>>>>>>>>> |
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1 |
273 |
10 *>>>>>>>>>> |
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1 |
273 |
10 *>>>>>>>>>> |
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3 |
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ITEM COUNT= 30, BYTE COUNT= 816, AVG. BYTES/ITEM= 27. AVG. ITEMS/GROUP= 10.0, STD. DEVIATION= .0, AVG. BYTES/GROUP=272. |
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