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Number Of Records Left in Data Source

This code is used to get Info of how many records left in Record 

Example after deleting how number records left in that Data source or After Adding records how many are there in the datasource 

public void init()

{

    QueryRun queryRun;

    super();

    queryRun = new QueryRun(Student_ds.query());

    info(strfmt("Total Records in Student Datasource %1",SysQuery::countTotal(queryRun)));


}

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