- 建表
CREATE TABLE test01.t_test (
id int PRIMARY KEY,
col1 text,
col2 date
);
- 增加数据
INSERT INTO <tablename>
(<column1 name>, <column2 name>....)
VALUES (<value1>, <value2>....)
USING <option>
cqlsh:test01> insert into test01.t_test (id , col1 , col2 ) VALUES ( 1, 'abc', '2019-09-27');
cqlsh:test01> insert into test01.t_test (id , col1 , col2 ) VALUES ( 2, 'abc', '2019-09-27');
cqlsh:test01> insert into test01.t_test (id , col1 , col2 ) VALUES ( 3, 'abc', '2019-09-27');
cqlsh:test01> select * from t_test ;
id | col1 | col2
1 | abc | 2019-09-27
2 | abc | 2019-09-27
3 | abc | 2019-09-27
- 更改数据
UPDATE <tablename>
SET <column name> = <new value>
<column name> = <value>....
WHERE <condition>
cqlsh:test01> UPDATE t_test SET col1 = 'ABC' , col2 = '2019-09-26' WHERE id = 3;
cqlsh:test01> SELECT * FROM t_test ;
id | col1 | col2
1 | abc | 2019-09-27
2 | abc | 2019-09-27
3 | ABC | 2019-09-26
- 查询数据
SELECT FROM <tablename>
SELECT FROM <table name> WHERE <condition>;
SELECT FROM <table name> WHERE <condition> ORDER BY <>;
cqlsh:test01> SELECT * FROM t_test ;
id | col1 | col2
1 | abc | 2019-09-27
2 | abc | 2019-09-27
3 | ABC | 2019-09-26
- 删除数据
DELETE FROM <identifier> WHERE <condition>;
cqlsh:test01> DELETE from t_test where id =3;
cqlsh:test01> SELECT * FROM t_test ;
id | col1 | col2
1 | abc | 2019-09-27
2 | abc | 2019-09-27
(2 rows)
cqlsh:test01> DELETE col2 FROM t_test WHERE id = 2;
cqlsh:test01> SELECT * FROM t_test ;
id | col1 | col2
1 | abc | 2019-09-27
2 | abc | null