https://community.qlik.com/t5/Talend-Studio/get-value-from-previous-line/m-p/2333109#M101924 <P>@Khouloud Mtar​&nbsp;, you need to use mapping variables in tmap to compare the previous row value with current row value.</P><P>&nbsp;</P><P>https://help.talend.com/r/6lpaT_M~MEVrltFQcrPe4g/ExuA1d66Ol9sbivXfV5aVQ</P><P>&nbsp;</P><P>Thanks,</P><P>Manohar</P> Wed, 24 Mar 2021 14:08:19 GMT manodwhb 2021-03-24T14:08:19Z https://community.qlik.com/t5/Talend-Studio/get-value-from-previous-line/m-p/2333108#M101923 <P>hi,</P><P></P><P></P><P>Question 1:i need to comapre a value from line n to a value from line n-1 and to get a value from previous line in tmap.</P><P>Question 2: can I sort data according to an order that I have specified?</P><P>can u help me please?</P><P></P><P></P><P></P><P></P> Wed, 24 Mar 2021 10:18:59 GMT https://community.qlik.com/t5/Talend-Studio/get-value-from-previous-line/m-p/2333108#M101923 user_kmt 2021-03-24T10:18:59Z https://community.qlik.com/t5/Talend-Studio/get-value-from-previous-line/m-p/2333109#M101924 <P>@Khouloud Mtar​&nbsp;, you need to use mapping variables in tmap to compare the previous row value with current row value.</P><P>&nbsp;</P><P>https://help.talend.com/r/6lpaT_M~MEVrltFQcrPe4g/ExuA1d66Ol9sbivXfV5aVQ</P><P>&nbsp;</P><P>Thanks,</P><P>Manohar</P> Wed, 24 Mar 2021 14:08:19 GMT https://community.qlik.com/t5/Talend-Studio/get-value-from-previous-line/m-p/2333109#M101924 manodwhb 2021-03-24T14:08:19Z https://community.qlik.com/t5/Talend-Studio/get-value-from-previous-line/m-p/2333110#M101925 <P>You can use tmemorize component to compare current data and Previous data</P> Tue, 30 Mar 2021 11:55:40 GMT https://community.qlik.com/t5/Talend-Studio/get-value-from-previous-line/m-p/2333110#M101925 Banupriya 2021-03-30T11:55:40Z