A type of sequence that has nothing to do with the contents of
your database is to number output rows from a query. When working
within an API, you can number the rows by maintaining a counter and
displaying its current value with each row’s contents. Here is an
example in Python, using the insects
table. It displays a simple numbered
list of the distinct values in the origin
column of the table:
cursor = conn.cursor () cursor.execute ("SELECT DISTINCT origin FROM insect") count = 1 for row in cursor.fetchall (): print count, row[0] count = count + 1 cursor.close ()
The mysql program provides no explicit row-numbering facilities, although you can use a user-defined variable to include an extra row number column in a query’s output. Another way to produce results that may be suitable for your purposes is to filter mysql output through another program that adds row numbers. Numbering Query Output Lines describes these techniques.
3.145.194.57