How to SELECT the last 10 rows of an SQL table which has no ID field

Question

I have an MySQL table with 25000 rows   This is an imported CSV file so I want to look at the last ten rows to make sure it imported everything   However  since there is no ID column  I can t say   SELECT   FROM big table ORDER BY id DESC   What SQL statement would show me the last 10 rows of this table   The structure of the table is simply this   columns are  A  B  C  D       AA  AB  AC       like Excel  all fields are of type TEXT

User · Answer

SELECT   FROM big table ORDER BY A DESC LIMIT 10

User · Answer

That can be done using the limit function  this might not seem new but i have added something The code should go   SELECT   FROM table name LIMIT 100 10    for the above case assume that you have 110 rows from the table and you want to select the last ten  100 is the row you want to start to print if you are to print   and ten shows how many rows you want to pick from the table  For a more precised way you can start by selecting all the rows you want to print out and then you grab the last row id if you have an id column i recommend you put one  then subtract ten from the last id number and that will be where you want to start  this will make your program to function autonomously and for any number of rows  but if you write the value directly i think you will have to change the code every time data is inserted into your table I think this helps Pax et Bonum

User · Answer

A low-tech approach  Doing this with SQL might be overkill  According to your question you just need to do a one-time verification of the import   Why not just do  SELECT   FROM ImportTable  and then scroll to the bottom of the results grid and visually verify the  last  few lines

User · Answer

You can use the  ORDER BY DESC  option  then put it back in the original order    SELECT   FROM tablename ORDER BY id DESC LIMIT 10  ORDER BY id

User · Answer

SQL tables have no implicit ordering  the order has to come from the data  Perhaps you should add a field to your table  e g  an int counter  and re-import the data   However that will only give the order of the import and not the data  If your data has no ordering you have to find out how to add it   EDIT  you say        to make sure it imported everything    What s wrong with using row count

User · Answer

If you have not tried the following command  SELECT TOP 10   FROM big table ORDER BY id DESC    I see it s working when I execute the command   SELECT TOP 10   FROM Customers ORDER BY CustomerId DESC    in the Try it yourself command window of https   www w3schools com sql sql func last asp

User · Answer

If you re doing a LOAD DATA INFILE  myfile csv  operation  the easiest way to see if all the lines went in is to check show warnings     If you load the data into an empty or temporary table  you can also check the number of rows that it has after the insert

User · Answer

Select from the table  use the ORDER BY    DESC to sort in reverse order  then limit your results to 10   SELECT   FROM big table ORDER BY A DESC LIMIT 10

User · Answer

If you want to retrieve last 10 records from sql use LIMIT  Suppose the data base contains 20 records Use the below query  SELECT   FROM TABLE NAME LIMIT 10 20    where 10 20 is the offset value Where 10 represent starting limit and 20 is the ending limit   i e 20 -10 10 records

User · Answer

executing a count    query on big data is expensive  i think using  SELECT   FROM table ORDER BY id DESC LIMIT n  where n is your number of rows per page is better and lighter

User · Answer

you can with code select 10 row from end of table  select   from  SELECT   FROM table1 order by id desc  LIMIT 10  as table2 order by id

User · Answer

If you know how many rows to expect  I would create a separate temporary table in your database of the expected structure  append into that  then check the count    Once you are good with that  then you can massage that data before appending it into your final production table

User · Answer

All the answers here are better  but just in case    There is a way of getting 10 last added records   thou this is quite unreliable      still you can do something like  SELECT   FROM table LIMIT 10 OFFSET N-10   N - should be the total amount of rows in the table  SELECT count    FROM table     You can put it in a single query using prepared queries but I ll not get into that

[sql] How to SELECT the last 10 rows of an SQL table which has no ID field?

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