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mysql查詢學(xué)生數(shù)據(jù),怎樣查詢一個(gè)時(shí)間范圍內(nèi)

mysql查詢學(xué)生數(shù)據(jù),怎樣查詢一個(gè)時(shí)間范圍內(nèi)?

SELECT

DATE_FORMAT( datetime列, '%Y-%m-%d' ) AS 日期,

SUM( ... ) AS 合計(jì),

COUNT( ... ) AS 行數(shù)

FROM

GROUP BY

DATE_FORMAT( datetime列, '%Y-%m-%d' )