MySql in 查询和其他查询效率对比

数据库表数据在 100万，in 匹配数据在500条左右。

匹配字段已经建立了索引。

 

1.

select f.recordType,f.id,f.selectMonthGroup from ftms_fly_training_record f where f.selectMonthGroup in
('1970-01','1970-02','1970-03','1970-04','1970-05','1970-06','1970-07','1970-08','1970-09','1970-10','1970-11','1970-12','1971-01','1971-02','1971-03','1971-04','1971-05','1971-06','1971-07','1971-08','1971-09','1971-10','1971-11','1971-12','1972-01','1972-02','1972-03','1972-04','1972-05','1972-06','1972-07','1972-08','1972-09','1972-10','1972-11','1972-12','1973-01','1973-02','1973-03','1973-04','1973-05','1973-06','1973-07','1973-08','1973-09','1973-10','1973-11','1973-12','1974-01','1974-02','1974-03','1974-04','1974-05','1974-06','1974-07','1974-08','1974-09','1974-10','1974-11','1974-12','1975-01','1975-02','1975-03','1975-04','1975-05','1975-06','1975-07','1975-08','1975-09','1975-10','1975-11','1975-12','1976-01','1976-02','1976-03','1976-04','1976-05','1976-06','1976-07','1976-08','1976-09','1976-10','1976-11','1976-12','1977-01','1977-02','1977-03','1977-04','1977-05','1977-06','1977-07','1977-08','1977-09','1977-10','1977-11','1977-12','1978-01','1978-02','1978-03','1978-04','1978-05','1978-06','1978-07','1978-08','1978-09','1978-10','1978-11','1978-12','1979-01','1979-02','1979-03','1979-04','1979-05','1979-06','1979-07','1979-08','1979-09','1979-10','1979-11','1979-12','1980-01','1980-02','1980-03','1980-04','1980-05','1980-06','1980-07','1980-08','1980-09','1980-10','1980-11','1980-12','1981-01','1981-02','1981-03','1981-04','1981-05','1981-06','1981-07','1981-08','1981-09','1981-10','1981-11','1981-12','1982-01','1982-02','1982-03','1982-04','1982-05','1982-06','1982-07','1982-08','1982-09','1982-10','1982-11','1982-12','1983-01','1983-02','1983-03','1983-04','1983-05','1983-06','1983-07','1983-08','1983-09','1983-10','1983-11','1983-12','1984-01','1984-02','1984-03','1984-04','1984-05','1984-06','1984-07','1984-08','1984-09','1984-10','1984-11','1984-12','1985-01','1985-02','1985-03','1985-04','1985-05','1985-06','1985-07','1985-08','1985-09','1985-10','1985-11','1985-12','1986-01','1986-02','1986-03','1986-04','1986-05','1986-06','1986-07','1986-08','1986-09','1986-10','1986-11','1986-12','1987-01','1987-02','1987-03','1987-04','1987-05','1987-06','1987-07','1987-08','1987-09','1987-10','1987-11','1987-12','1988-01','1988-02','1988-03','1988-04','1988-05','1988-06','1988-07','1988-08','1988-09','1988-10','1988-11','1988-12','1989-01','1989-02','1989-03','1989-04','1989-05','1989-06','1989-07','1989-08','1989-09','1989-10','1989-11','1989-12','1990-01','1990-02','1990-03','1990-04','1990-05','1990-06','1990-07','1990-08','1990-09','1990-10','1990-11','1990-12','1991-01','1991-02','1991-03','1991-04','1991-05','1991-06','1991-07','1991-08','1991-09','1991-10','1991-11','1991-12','1992-01','1992-02','1992-03','1992-04','1992-05','1992-06','1992-07','1992-08','1992-09','1992-10','1992-11','1992-12','1993-01','1993-02','1993-03','1993-04','1993-05','1993-06','1993-07','1993-08','1993-09','1993-10','1993-11','1993-12','1994-01','1994-02','1994-03','1994-04','1994-05','1994-06','1994-07','1994-08','1994-09','1994-10','1994-11','1994-12','1995-01','1995-02','1995-03','1995-04','1995-05','1995-06','1995-07','1995-08','1995-09','1995-10','1995-11','1995-12','1996-01','1996-02','1996-03','1996-04','1996-05','1996-06','1996-07','1996-08','1996-09','1996-10','1996-11','1996-12','1997-01','1997-02','1997-03','1997-04','1997-05','1997-06','1997-07','1997-08','1997-09','1997-10','1997-11','1997-12','1998-01','1998-02','1998-03','1998-04','1998-05','1998-06','1998-07','1998-08','1998-09','1998-10','1998-11','1998-12','1999-01','1999-02','1999-03','1999-04','1999-05','1999-06','1999-07','1999-08','1999-09','1999-10','1999-11','1999-12','2000-01','2000-02','2000-03','2000-04','2000-05','2000-06','2000-07','2000-08','2000-09','2000-10','2000-11','2000-12','2001-01','2001-02','2001-03','2001-04','2001-05','2001-06','2001-07','2001-08','2001-09','2001-10','2001-11','2001-12','2002-01','2002-02','2002-03','2002-04','2002-05','2002-06','2002-07','2002-08','2002-09','2002-10','2002-11','2002-12','2003-01','2003-02','2003-03','2003-04','2003-05','2003-06','2003-07','2003-08','2003-09','2003-10','2003-11','2003-12','2004-01','2004-02','2004-03','2004-04','2004-05','2004-06','2004-07','2004-08','2004-09','2004-10','2004-11','2004-12','2005-01','2005-02','2005-03','2005-04','2005-05','2005-06','2005-07','2005-08','2005-09','2005-10','2005-11','2005-12','2006-01','2006-02','2006-03','2006-04','2006-05','2006-06','2006-07','2006-08','2006-09','2006-10','2006-11','2006-12','2007-01','2007-02','2007-03','2007-04','2007-05','2007-06','2007-07','2007-08','2007-09','2007-10','2007-11','2007-12','2008-01','2008-02','2008-03','2008-04','2008-05','2008-06','2008-07','2008-08','2008-09','2008-10','2008-11','2008-12','2009-01','2009-02','2009-03','2009-04','2009-05','2009-06','2009-07','2009-08','2009-09','2009-10','2009-11','2009-12','2010-01','2010-02','2010-03','2010-04','2010-05','2010-06','2010-07','2010-08','2010-09','2010-10','2010-11','2010-12','2011-01','2011-02','2011-03','2011-04','2011-05','2011-06','2011-07','2011-08','2011-09','2011-10','2011-11','2011-12','2012-01','2012-02','2012-03','2012-04','2012-05','2012-06','2012-07','2012-08','2012-09','2012-10','2012-11','2012-12','2013-01','2013-02','2013-03','2013-04','2013-05','2013-06','2013-07','2013-08','2013-09','2013-10','2013-11','2013-12','2014-01','2014-02','2014-03','2014-04','2014-05','2014-06','2014-07','2014-08','2014-09','2014-10','2014-11','2014-12','2015-01','2015-02','2015-03','2015-04','2015-05','2015-06','2015-07','2015-08','2015-09','2015-10','2015-11','2015-12','2016-01','2016-02','2016-03','2016-04','2016-05','2016-06','2016-07','2016-08','2016-09','2016-10','2016-11','2016-12','2017-01','2017-02','2017-03','2017-04','2017-05','2017-06','2017-07','2017-08','2017-09','2017-10','2017-11','2017-12','2018-01','2018-02','2018-03','2018-04','2018-05','2018-06','2018-07','2018-08','2018-09','2018-10','2018-11','2018-12','2019-01','2019-02','2019-03')

查询时间是5.76s,作为这个速度，肯定是太慢了。

 

2.

select * from ftms_fly_training_record f where 
f.selectMonthGroup >= '1970-01' and f.selectMonthGroup <= '2019-02'

这个查询，10.74s

 

指定字段

select f.recordType,f.id,f.selectMonthGroup from ftms_fly_training_record f where 
f.selectMonthGroup >= '1970-01' and f.selectMonthGroup <= '2019-02'

和上一条同样的条件，不过指定了字段，只需要4.75s

 

3.

select f.recordType,f.id,f.selectMonthGroup,count(*) from ftms_fly_training_record f 
where str_to_date(f.selectMonthGroup,'%Y-%m') >= 
str_to_date('1970-01','%Y-%m') and str_to_date(f.selectMonthGroup,'%Y-%m') 
<= str_to_date('2019-01','%Y-%m')

这次查询最快，用了4.336秒。

通过测试采用此种方法进行应用。