Description
Several queries are executed in a single MDB2GMS call. The results are written to a single GDX file. This model is referenced in "Example 7 - Multi-Query Batch Example" section "Output: A single GDX File" from the MDB2GMS Documentation. Keywords: MDB2GMS, data exchange, GAMS language features
Category : GAMS Data Utilities library
Main file : SalesProfitDB4.gms includes : Sample.accdb SalesProfitDB4.gms
$title MDB2GMS Example 7 - Multi-Query Batch Example (Output: A single GDX File) (SalesProfitDB4,SEQ=037)
$onText
Several queries are executed in a single MDB2GMS call. The results are written
to a single GDX file.
This model is referenced in "Example 7 - Multi-Query Batch Example" section
"Output: A single GDX File" from the MDB2GMS Documentation.
Keywords: MDB2GMS, data exchange, GAMS language features
$offText
$callTool win32.msappavail Access
$if errorlevel 1 $abort.noError "No Access available"
$onEcho > howToRead.txt
I=Sample.accdb
X=Sample.gdx
Q1=SELECT distinct(year) FROM data
S1=year
Q2=SELECT distinct(loc) FROM data
S2=loc
Q3=SELECT distinct(prod) FROM data
S3=prd
Q4=SELECT prod, loc, year, sales FROM data
P4=sales
Q5=SELECT prod, loc, year, profit FROM data
P5=profit
$offEcho
$call mdb2gms @howToRead.txt > %system.nullfile%
$ifE errorLevel<>0 $abort Error using MDB2GMS!
Set
y 'years'
loc 'locations'
prd 'products';
Parameter
sales(prd,loc,y)
profit(prd,loc,y);
$gdxIn Sample.gdx
$load y=year prd loc sales profit
$gdxIn
display sales, profit;