QUERY = '''
select name, birthdate from animals where species = 'gorilla';
'''
+———+————+
| name | birthdate |
+=========+============+
| Max | 2001-04-23 |
| Dave | 1988-09-29 |
| Becky | 1979-07-04 |
| Liz | 1998-06-12 |
| George | 2011-01-09 |
| George | 1998-05-18 |
| Wendell | 1982-09-24 |
| Bjorn | 2000-03-07 |
| Kristen | 1990-04-25 |
+———+————+
select name, birthdate from animals where species = ‘gorilla’ and name = ‘Max’
否定
QUERY = '''
select name, birthdate from animals where species != 'gorilla' and name != 'Max';
'''
between文
QUERY = '''
select name from animals where species = 'llama' AND birthdate between '1995-01-01' AND '1998-12-31';
'''
query
QUERY = "select max(name) from animals;"
QUERY = "select * from animals limit 10;"
QUERY = "select * from animals where species = 'orangutan' order by birthdate;"
QUERY = "select name from animals where species = 'orangutan' order by birthdate desc;"
QUERY = "select name, birthdate from animals order by name limit 10 offset 20;"
QUERY = "select species, min(birthdate) from animals group by species;"
QUERY = '''
select name, count(*) as num from animals
group by name
order by num desc
limit 5;
'''
Limit count Offset skip
limit is how many rows to return
offset is how far into the results to start
Order by columns DESC
columns is which columns to sort by, separated with commas
DESC is sort in reverse order(descending)
Group by columns
columns is which columns to use as groupings when aggregating
QUERY = "select count(*) as num, species from animals group by species order by num desc;"
insert
INSERT_QUERY = '''
insert into animals (name, species, birthdate) values ('yoshi', 'opposum', '2016-12-13');
'''
