MySQL行列轉換拼接

標籤：

mysql> select TBL_ID,CREATE_TIME,LAST_ACCESS_TIME,TBL_NAME,TBL_TYPE from TBLS;

+--------+-------------+------------------+----------------------+---------------+

| TBL_ID | CREATE_TIME | LAST_ACCESS_TIME | TBL_NAME             | TBL_TYPE      |

+--------+-------------+------------------+----------------------+---------------+

|      6 |  1437309077 |                0 | students             | MANAGED_TABLE |

|     11 |  1437402612 |                0 | user_info_bucketed_1 | MANAGED_TABLE |

+--------+-------------+------------------+----------------------+---------------+

2 rows in set (0.00 sec)

 

mysql> select TBL_ID,CREATE_TIME,LAST_ACCESS_TIME,TBL_NAME,TBL_TYPE from TBLS \G;

*************************** 1. row ***************************

          TBL_ID: 6

     CREATE_TIME: 1437309077

LAST_ACCESS_TIME: 0

        TBL_NAME: students

        TBL_TYPE: MANAGED_TABLE

*************************** 2. row ***************************

          TBL_ID: 11

     CREATE_TIME: 1437402612

LAST_ACCESS_TIME: 0

        TBL_NAME: user_info_bucketed_1

        TBL_TYPE: MANAGED_TABLE

2 rows in set (0.00 sec)

 

mysql> select * from user_info;

+---------+-----------+-----------+

| user_id | firstname | lastname  |

+---------+-----------+-----------+

|     100 | Hadoop    | Spark01   |

|     100 | Hadoop    | Spark02   |

|     100 | Hadoop    | Spark03   |

|     200 | Hive      | Python2.6 |

|     200 | Hive      | Python2.7 |

|     200 | Hive      | Python3.3 |

|     200 | Hive      | Python3.4 |

|     300 | HBase     | Pig       |

|     300 | HBase     | Zoo       |

+---------+-----------+-----------+

9 rows in set (0.00 sec)

 

mysql> select user_id,group_concat(firstname) from user_info group by user_id;

+---------+-------------------------+

| user_id | group_concat(firstname) |

+---------+-------------------------+

|     100 | Hadoop,Hadoop,Hadoop    |

|     200 | Hive,Hive,Hive,Hive     |

|     300 | HBase,HBase             |

+---------+-------------------------+

3 rows in set (0.06 sec)

 

mysql> select user_id,group_concat(lastname) from user_info group by user_id;

+---------+-----------------------------------------+

| user_id | group_concat(lastname)                  |

+---------+-----------------------------------------+

|     100 | Spark01,Spark02,Spark03                 |

|     200 | Python2.6,Python2.7,Python3.3,Python3.4 |

|     300 | Pig,Zoo                                 |

+---------+-----------------------------------------+

3 rows in set (0.00 sec)

 

mysql> select user_id,group_concat(lastname separator ‘;‘) from user_info group by user_id;

+---------+-----------------------------------------+

| user_id | group_concat(lastname separator ‘;‘)    |

+---------+-----------------------------------------+

|     100 | Spark01;Spark02;Spark03                 |

|     200 | Python2.6;Python2.7;Python3.3;Python3.4 |

|     300 | Pig;Zoo                                 |

+---------+-----------------------------------------+

3 rows in set (0.00 sec)

 

mysql> select user_id,group_concat(lastname order by lastname desc separator ‘#‘) from user_info group by user_id;

+---------+-------------------------------------------------------------+

| user_id | group_concat(lastname order by lastname desc separator ‘#‘) |

+---------+-------------------------------------------------------------+

|     100 | Spark03#Spark02#Spark01                                     |

|     200 | Python3.4#Python3.3#Python2.7#Python2.6                     |

|     300 | Zoo#Pig                                                     |

+---------+-------------------------------------------------------------+

3 rows in set (0.00 sec)

MySQL行列轉換拼接