CODEWITHSUNDEEP
mysqlsqlwindow-functionsmysql-5.7
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Sr New

Reputation: 77

ERROR 1064 (42000) database error in syntax of over partition by

mysql> select * from FinalTable;
+------+-------+-------+---------------------+
| id   | name  | state | timestamp           |
+------+-------+-------+---------------------+
|   12 | name1 | TX    | 2020-01-25 11:29:36 |
|   14 | name3 | CA    | 2020-01-25 11:29:36 |
|   14 | name3 | TX    | 2020-01-25 11:29:36 |
|   12 | name1 | CA   | 2020-01-25 11:29:36 |
|   13 | name2 | TA   | 2020-01-25 11:29:36 |
|   14 | name3 |  CA   | 2020-01-25 11:29:36 |
+------+-------+-------+---------------------+

I am looking at output query which gives response as:

I2 name1 TX 2020-01-25 11:29:36  CA 2020-01-25 11:29:36

when I run the query,

select id,name,state,timestamp,
lead(state,1) over (partition by id order by timestamp asc) out_state,
lead(timestamp,1) over (partition by id order by timestamp asc) out_timestamp
from FinalTable

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(partition by id order by timestamp asc) out_state,
lead(timestamp,1) over (part' at line 2

also is it possible to create timetamp upto milliseconds instead of seconds in DB? I am using CURRENT_TIMESTAMP.

Upvotes: 0

Views: 729

Answers (1)

GMB
GMB

Reputation: 222382

Window functions (such as lead()) were added in MySQL 8.0 only, so they are not available in version 5.7. You can emulate lead() with a self-join like so:

select t.*, tlead.state, tlead.timestamp
from FinalTable t
left join FinalTable tlead 
    on tlead .id = t.id
    and tlead.timestamp = (
        select min(t1.timestamp) 
        from FinalTable t1 
        where t1.id = t.id and t1.timestamp > t.timestamp
    )

Side note: for this method to work properly, you need subsequent records of the same id to have different timestamps - which is not the case in the sample data that you showed, where all timestamps are the same (I assume this is a typo in your sample data).

Upvotes: 1

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