QlikView Reference Manual.pdf - QlikCommunity - QlikView

Script Example:
QV_Table:
SQL SELECT PrimaryKey, X, Y FROM DB_TABLE
WHERE ModificationTime >= #$(LastExecTime)#
AND ModificationTime < #$(BeginningThisExecTime)#;
Concatenate LOAD PrimaryKey, X, Y FROM File.QVD;
STORE QV_Table INTO File.QVD;
Case 3: Insert and Update (No Delete)
The next case is applicable when data in previously loaded records may have changed between script
executions. The following conditions apply:
l The data source can be any database.
l QlikView loads records inserted into the database or updated in the database after the last script execution
l A field ModificationDate (or similar) is required for QlikView to recognize which records are new.
l A primary key field is required for QlikView to sort out updated records from the QVD file.
l This solution will force the reading of the QVD file to "standard mode" (rather than "super-fast mode"), which is still
considerably faster than loading the entire database.
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