ETL-Tools-QlikView connector is the only one which can perform complex data transformations and validations while loading data into QlikVew. It has more than 500 functions and can load the data from Flat files, Excel, MS Access, DBF, FoxPro, ODBC, OLE DB, MS Sql Server, Oracle, MySql, PostgreSQL, Firebird, Interbase, POP3 + SSL, File System, XML and QVX files. All this can be achieved without writing a single line of code.