• Top 100
  • Top 100 on latest exercises
  • "Liberal" rating
  • Olympic rating
  • TOP 100 of Learning Stage
  • Rating by summation of ranks
  • Top 10 (photos)
  • Last-week results
  • Rating of second-stage exercises (average)
  • Rating of 2nd-stage exercises (median)
  • Author's rating
  • 2nd stage rating up to exercise:
   enter No 
  • Rating on the exercise:
   enter No
  • Optimistic rating
   enter factor

  • Today statistics
  • Site's old residents
  • Recent leaders activity
  • Сhanges in exercises' TOP 10
  • Results' chart

  • Site rules
  • SELECT (learning stage)
  • SELECT (learning stage,
      choosing DBMS)
  • SELECT (rating stages)
  • DML 
  • Transact-SQL tests
  • Data simulation
  • Data simulation (DML);
  • Visual simulation (painting)
  • Exercises voting (SELECT)
  • Exercises voting (DML)

  • Learning stage
  • Rating stages
  • Favorites
  • Search
  • Blogs

  • About certification
  • Certified professionals
  • Statistics
  • Statistics over regions (map)
  • Confirm certificate

Available actions

"Testing" service is intended for testing of the specialists and for generation of the tests. Any participant, who has met all the certification requirements ("All requirements") for SQL DML, may be the author of the questions of the test.
The question is included into the test only upon moderator's approval.
Authorization is required to access the service.
The available tests:

• Transact-SQL (demo)

  • Certified professionals
  • Statistics

  • SELECT (learning stage)
  • SELECT (learn, choose DBMS)
  • SELECT (rating stages)
  • DML 
  • Data simulation

  • Learning stage
  • Rating stages
  • Favorites
  • Search

  • Top 100
  • Today statistics
  • Recent leaders activity   • Rating of 2nd-stage exercises (median)

  • SQL(DML) help
  • SQL Tutorial
  • FAQ
  • Send message

  • Query plan
  • Rating by cost
  • Optimization competition