将数据字段分为两列并将其插入现有表（MYSQL）

Question

im trying to split a specific column in an already existing table in MYSQL into two columns, AND grab the returning two columns and inserting them into an already existing table.

I just started learning MYSQL couple of days ago, sorry if thats a noob questions:

here is what i tried so far:

MYSQL Code begins :

SELECT substring_index(substring_index(ZIP_code, '-',1), '-', -1) as ZIP,
       substring_index(substring_index(ZIP_code, '-',2), '-', -1) as Extended_info,
from Region.Address

MYSQL Code Ends :

this did split my datafield which looks like this '12345-990001' into two columns, one as the ZIP and the second as additional data. the problem is that i cant add the return of this into another table that i have. here is the syntax that im using now (its not working though):

MYSQL Code begins :

INSERT INTO TABLE Location 
(SELECT substring_index(substring_index(ZIP_code, '-',1), '-', -1) as ZIP,
       substring_index(substring_index(ZIP_code, '-',2), '-', -1) as Extended_info,
from Region.Address) where ZIP is varchar(64), AND Extended_info is varchar(64)

MYSQL Code Ends :

any help that would be much appreciated, thank you in advance!

Answer 1

You should always use a column list with insert . The problem is that your query is being interpreted as:

insert into location(select . . .)

And select is not a valid column. Also, the word table is not necessary. So try this:

INSERT INTO Location(zip, extended_info) 
    SELECT substring_index(substring_index(ZIP_code, '-',1), '-', -1) as ZIP,
           substring_index(substring_index(ZIP_code, '-',2), '-', -1) as Extended_info,
    from Region.Address;

Note: I am guessing what the column names are.

EDIT:

You need to insert a value into all columns that have no default values and cannot accept NULLs. I would guess that zip_code is the field you want to populate with zip :

INSERT INTO Location(zip_code, extended_info) 
    SELECT substring_index(substring_index(ZIP_code, '-',1), '-', -1) as ZIP,
           substring_index(substring_index(ZIP_code, '-',2), '-', -1) as Extended_info,
    from Region.Address;

Perhaps you want something like this:

INSERT INTO Location(zip_code, zip, extended_info) 
    SELECT '' as zip_code,
           substring_index(substring_index(ZIP_code, '-',1), '-', -1) as ZIP,
           substring_index(substring_index(ZIP_code, '-',2), '-', -1) as Extended_info,
    from Region.Address;