| SQL exercises | November 09, 01:10 MSK |
| Today statisticsnLog - number of logins;
nSelEx - number of select exercises solved today; lastEx - number of last select exercise solved; nDmlEx - number of dml exercises solved today; Scores - sum of points on the exercises solved today (select and dml); numLrnEx, LrnScores - number of exercises solved today and sum of points on learning stage
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