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SueSonnenschein
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#SHOW DATABASES; USE simplewiki_p; #SHOW TABLES; #DESCRIBE actor; #name of the table, gives list of all the columns in the table #SELECT * FROM page LIMIT 10 # * means all the columns; from table that is named page; first 10 elements #SELECT page_len FROM page LIMIT 10; #slices down to one column in the particular table #SELECT * FROM revision LIMIT 10; #SELECT * FROM revision ORDER by rev_timestamp LIMIT 10; #SELECT rev_page FROM revision ORDER by rev_timestamp DESC limit 10; #ordered descendingly; Ids of the last 10 pages edited on Wikipedia #SELECT rev_page, page_title, rev_timestamp #FROM revision JOIN page ON rev_page = page_id #ORDER by rev_timestamp ASC limit 10; #want to query from both tables at the same time and want to see first ten, ordered in ascending order #having it from revision table, so can appear multiple times SELECT * FROM user limit 10; #user is table name SELECT rev_page, page_title, rev_timestamp, rev_actor, user_name FROM revision JOIN page ON rev_page = page_id JOIN user ON rev_actor= user_id ORDER by rev_timestamp ASC limit 10;
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