Insert from two tables where condition

Question

I have 3 tables

Table 1 EIN columns :

id, name, plate,in_datetime,time,image-name.

Table 2 EOUT columns :

id, name, plate, out_datetime, time, image-name.

Table 3 recon columns :

id, plate,in_datetime,in_entry_id,out_datetime, out_entry_id,Processed, duration.

I need to get table 1 and table 2 values into table 3 columns using where condition. I am using the below query:

INSERT INTO recon (id,EIN.plate,EIN.in_datetime, EIN.id,  EOUT.out_datetime, EOUT.id,null, null) 
    SELECT EIN.RegistrationMark,EIN.datetime,EIN.id, EOUT.date,EOUT.id FROM EIN_anpr_vega as EIN, EOUT_anpr_vega as  EOUT
    where EIN.plate = EOUT.plate
    and EIN.in_datetime = EOUT.out_datetime

I am getting an error near null, null. below is the error.

for the right syntax to use near 'null, null

Answer 1

In your column names you cant write null

INSERT INTO recon (id,EIN.plate,EIN.in_datetime, EIN.id,  EOUT.out_datetime, EOUT.id,null, null) 

Instead, write the column names and place the nulls in the select. Like this:

INSERT INTO recon (id,EIN.plate,EIN.in_datetime, EIN.id,  EOUT.out_datetime, EOUT.id,col1, col2) 
    SELECT EIN.RegistrationMark,EIN.datetime,EIN.id, EOUT.date,EOUT.id, null, null FROM EarlsdonMSIN_anpr_vega as EIN, EarlsdonMSOUT_anpr_vega as  EOUT
    where EIN.plate = EOUT.plate
    and EIN.in_datetime = EOUT.out_datetime

Answer 2

INSERT INTO recon (id, EIN.plate ...) VALUES ...

The things inside the first () are supposed to be column names for the table recon . (I'm surprised that it did not show a syntax error with EIN.plate .)

Yes, later, null will get into trouble for the same reason -- it is not a column name.