数据类型

MatrixOne 的数据类型与 MySQL 数据类型的定义一致，可参考： https://dev.mysql.com/doc/refman/8.0/en/data-types.html

整数类型

示例

• TINYINT and TINYINT UNSIGNED

-- Create a table named "inttable" with 2 attributes of a "tinyint", a "tinyint unsigned",
create table inttable ( a tinyint not null default 1, tinyint8 tinyint unsigned primary key);
insert into inttable (tinyint8) values (0),(255), (0xFE), (253);
mysql> select * from inttable order by 2 asc;
+------+----------+
| a    | tinyint8 |
+------+----------+
|    1 |        0 |
|    1 |      253 |
|    1 |      254 |
|    1 |      255 |
+------+----------+
4 rows in set (0.03 sec)

• SMALLINT 和 SMALLINT UNSIGNED

-- Create a table named "inttable" with 2 attributes of a "smallint", a "smallint unsigned",
drop table inttable;
create table inttable ( a smallint not null default 1, smallint16 smallint unsigned);
insert into inttable (smallint16) values (0),(65535), (0xFFFE), (65534), (65533);
mysql> select * from inttable;
+------+------------+
| a    | smallint16 |
+------+------------+
|    1 |          0 |
|    1 |      65535 |
|    1 |      65534 |
|    1 |      65534 |
|    1 |      65533 |
+------+------------+
5 rows in set (0.01 sec)

• INT 和 INT UNSIGNED

-- Create a table named "inttable" with 2 attributes of a "int", a "int unsigned",
drop table inttable;
create table inttable ( a int not null default 1, int32 int unsigned primary key);
insert into inttable (int32) values (0),(4294967295), (0xFFFFFFFE), (4294967293), (4294967291);
mysql> select * from inttable order by a desc, 2 asc;
+------+------------+
| a    | int32      |
+------+------------+
|    1 |          0 |
|    1 | 4294967291 |
|    1 | 4294967293 |
|    1 | 4294967294 |
|    1 | 4294967295 |
+------+------------+
5 rows in set (0.01 sec)

• BIGINT 和 BIGINT UNSIGNED

-- Create a table named "inttable" with 2 attributes of a "bigint", a "bigint unsigned",
drop table inttable;
create table inttable ( a bigint, big bigint primary key );
insert into inttable values (122345515, 0xFFFFFFFFFFFFE), (1234567, 0xFFFFFFFFFFFF0);
mysql> select * from inttable;
+-----------+------------------+
| a         | big              |
+-----------+------------------+
| 122345515 | 4503599627370494 |
|   1234567 | 4503599627370480 |
+-----------+------------------+
2 rows in set (0.01 sec)

浮点类型

示例

-- Create a table named "floattable" with 1 attributes of a "float"
create table floattable ( a float not null default 1, big float(20,5) primary key);
insert into floattable (big) values (-1),(12345678.901234567),(92233720368547.75807);
mysql> select * from floattable order by a desc, big asc;
+------+----------------+
| a    | big            |
+------+----------------+
|    1 |             -1 |
|    1 |       12345679 |
|    1 | 92233720000000 |
+------+----------------+
3 rows in set (0.01 sec)
mysql> select min(big),max(big),max(big)-1 from floattable;
+----------+----------------+----------------+
| min(big) | max(big)       | max(big) - 1   |
+----------+----------------+----------------+
|       -1 | 92233720000000 | 92233718038527 |
+----------+----------------+----------------+
1 row in set (0.01 sec)

字符串类型

示例

• CHAR 和 VARCHAR

-- Create a table named "names" with 2 attributes of a "varchar" and a "char"
create table names(name varchar(255),age char(255));
insert into names(name, age) values('Abby', '24');
insert into names(name, age) values("Bob", '25');
insert into names(name, age) values('Carol', "23");
insert into names(name, age) values("Dora", "29");
mysql> select name,age from names;
+-------+------+
| name  | age  |
+-------+------+
| Abby  | 24   |
| Bob   | 25   |
| Carol | 23   |
| Dora  | 29   |
+-------+------+
4 rows in set (0.00 sec)

• TEXT

-- Create a table named "texttest" with 1 attribute of a "text"
create table texttest (a text);
insert into texttest values('abcdef');
insert into texttest values('_bcdef');
insert into texttest values('a_cdef');
insert into texttest values('ab_def');
insert into texttest values('abc_ef');
insert into texttest values('abcd_f');
insert into texttest values('abcde_');
mysql> select * from texttest where a like 'ab\_def' order by 1 asc;
+--------+
| a      |
+--------+
| ab_def |
+--------+
1 row in set (0.01 sec)

• BLOB

-- Create a table named "blobtest" with 1 attribute of a "blob"
create table blobtest (a blob);
insert into blobtest values('abcdef');
insert into blobtest values('_bcdef');
insert into blobtest values('a_cdef');
insert into blobtest values('ab_def');
insert into blobtest values('abc_ef');
insert into blobtest values('abcd_f');
insert into blobtest values('abcde_');
mysql> select * from blobtest where a like 'ab\_def' order by 1 asc;
+----------------+
| a              |
+----------------+
| 0x61625F646566 |
+----------------+
1 row in set (0.01 sec)

JSON 数据类型

示例

-- Create a table named "jsontest" with 1 attribute of a "json"
create table jsontest (a json,b int);
insert into jsontest values ('{"t1":"a"}',1),('{"t1":"b"}',2);
mysql> select * from jsontest;
+-------------+------+
| a           | b    |
+-------------+------+
| {"t1": "a"} |    1 |
| {"t1": "b"} |    2 |
+-------------+------+
2 rows in set (0.01 sec)

时间与日期

示例

• TIME

-- Create a table named "timetest" with 1 attributes of a "time"
create table time_02(t1 time);
insert into time_02 values(200);
insert into time_02 values("");
mysql> select * from time_02;
+----------+
| t1       |
+----------+
| 00:02:00 |
| NULL     |
+----------+
2 rows in set (0.00 sec)

• DATE

-- Create a table named "datetest" with 1 attributes of a "date"
create table datetest (a date not null, primary key(a));
insert into datetest values ('2022-01-01'), ('20220102'),('2022-01-03'),('20220104');
mysql> select * from datetest order by a asc;
+------------+
| a          |
+------------+
| 2022-01-01 |
| 2022-01-02 |
| 2022-01-03 |
| 2022-01-04 |
+------------+

• DATETIME

-- Create a table named "datetimetest" with 1 attributes of a "datetime"
create table datetimetest (a datetime(0) not null, primary key(a));
insert into datetimetest values ('20200101000000'), ('2022-01-02'), ('2022-01-02 00:00:01'), ('2022-01-02 00:00:01.512345');
mysql> select * from datetimetest order by a asc;
+---------------------+
| a                   |
+---------------------+
| 2020-01-01 00:00:00 |
| 2022-01-02 00:00:00 |
| 2022-01-02 00:00:01 |
| 2022-01-02 00:00:02 |
+---------------------+
4 rows in set (0.02 sec)

• TIMESTAMP

-- Create a table named "timestamptest" with 1 attribute of a "timestamp"
create table timestamptest (a timestamp(0) not null, primary key(a));
insert into timestamptest values ('20200101000000'), ('2022-01-02'), ('2022-01-02 00:00:01'), ('2022-01-02 00:00:01.512345');
mysql> select * from timestamptest;
+---------------------+
| a                   |
+---------------------+
| 2020-01-01 00:00:00 |
| 2022-01-02 00:00:00 |
| 2022-01-02 00:00:01 |
| 2022-01-02 00:00:02 |
+---------------------+

Bool

示例

-- Create a table named "booltest" with 2 attribute of a "boolean" and b "bool"
create table booltest (a boolean,b bool);
insert into booltest values (0,1),(true,false),(true,1),(0,false),(NULL,NULL);
mysql> select * from booltest;
+-------+-------+
| a     | b     |
+-------+-------+
| false | true  |
| true  | false |
| true  | true  |
| false | false |
| NULL  | NULL  |
+-------+-------+
5 rows in set (0.00 sec)

定点类型 Decimal(Beta)

示例

-- Create a table named "decimalTest" with 2 attribute of a "decimal" and b "decimal"
create table decimalTest(a decimal(6,3), b decimal(24,18));
insert into decimalTest values(123.4567, 123456.1234567891411241355);
mysql> select * from decimalTest;
+---------+---------------------------+
| a       | b                         |
+---------+---------------------------+
| 123.457 | 123456.123456789141124136 |
+---------+---------------------------+
1 row in set (0.00 sec)