DATE
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Introduction |
The DATE command is used to assign a date value to a memory variable of date type.
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Syntax |
DATE name = date ; DATE name = expression ;
A DATE variable 'per1' can later on be referenced to by means of '#per1' or '{per1}'. For dates, the former variant is typically preferable.
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Example |
You may use simple additions/subtractions in the option field, when referring to these dates. For instance
PRT <#per1-2 #per1+1> fY;
You may wish to use dates to control the flow of your system of command files, centralizing the assignment of dates in one place.
DATE per1 = 2012; DATE per2 = 2040; READ lang11; UPD <#per1 #per1> JDfVmo + 1000; SIM <#per1 #per2>; MULPRT <#per1-1 #per2> fY;
Conversions are possible:
STRING s1 = '2010'; VAL v1 = 2015; DATE d1 = #s1; DATE d2 = #v1; TIME #d1 #d2;
The conversion will fail if not possible (for instance the string '201o' or val 2015.4). If you need to explicitely convert to a date (for instance inside an expression), you may use the DATE() function.
CREATE data; FOR date d = 2010 to 2015; UPD <#d #d> data = val(#d)-2000; END;
Here, an explicit conversion from the #d variable is done. The result is this:
data 2010 10.0000 2011 11.0000 2012 12.0000
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Note |
Dates are memory variables, and in this respect similar to strings and values (see STRING and VAL).
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Related commands |