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types of table and classification of Evaluate statements


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elayarajack

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Joined: 15 Feb 2004
Posts: 8

PostPosted: Thu Feb 19, 2004 2:20 pm
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hi,

can any one tell me the types of tables(may be of 2 types) and classifications or types of evaluate stmts. i need it for interveiw purpose.
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franclin

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Joined: 23 May 2003
Posts: 11
Location: Chennai, India

PostPosted: Thu Feb 19, 2004 3:09 pm
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Hi elayarajack,


Tables:

There are two types of Tables. viz.,
1. Fixed Length Tables,
2. Variable Length Tables.

1. Fixed Length Tables: Fixed Length tables are speified using the occurs clause. Because seven subscripts or indexes are allowed, six nested levels and one outermost level of the format 1 occurs clause are allowed.

2. Variable Length Tables: Variable-length table are specifed using the OCCURS DEPENDING ON clause. The length of the subject item is fied, it is only the number of repetitions of the subject item that is variable.


Evaluate:

1. General Evaluate (In which, we can also use THRU in WHEN condition)
2. Evaluate ALSO (In which, we can also use THRU in WHEN Condition)

syntax:

Evaluate Case-1{ ALSO Case-2}
WHEN Conditon1{ ALSO Condition2.}
...
{When Other Imperative-Stmt}
end-evaluate.

Case-1 & Case-2 May be in these forms.
1.Identifier
2.Literal
3.Expression
4.TRUE
5.FALSE


Condition1 or Condition-2:

ANY
condition
TRUE
FALSE
NOT Condition1 THRU Condition1
I think its enough to you
REGARDS,
SUMAN
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