Table: entretusbrazos_chart
Columns: year
chart
track
peak
weeks_on_chart

Question: Name the least weeks for year less than 2000
SQL: SELECT MIN("weeks_on_chart") FROM entretusbrazos_chart WHERE "year" < 2000

Question: Name the total number of weeks for si te vas and peak less than 7 and year less than 2000
SQL: SELECT COUNT("weeks_on_chart") FROM entretusbrazos_chart WHERE "track" = 'si te vas' AND "peak" < 7 AND "year" < 2000