Text, query, text+query+text SQL error

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Text,query,text+query+text

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Msg 245, Level 16, State 1, Line 9
Conversion failed when converting the varchar value '404-Nivelacija MPC - ' to data type int.

What I have tried:

INSERT into dbo.trgovacka_knjiga (redni_broj, broj_dokumenta, opis) 
VALUES (1, (select max (redni_broj) from dbo.nivelacije_lista), '404-Nivelacija MPC - '+ (select max(redni_broj) from dbo.nivelacije_lista) +' / 2019')

Posted 12-Jul-19 22:55pm

Goran Bibic

Updated 12-Jul-19 23:07pm

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Goran Bibic 13-Jul-19 5:02am

This is type work

'404-Nivelacija MPC - " + redni_brojListaTextBox.Text + "/" + DateTime.Now.Year + "'

This is type I need

'404-Nivelacija MPC - " + (select max(redni_broj) from dbo.nivelacije_lista) + "/" + DateTime.Now.Year + "'

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OriginalGriff · Accepted Answer · 2019-07-12T23:07:00

You are trying to concatenate a string with an int:

SQL

'404-Nivelacija MPC - '+ (select max(redni_broj) from dbo.nivelacije_lista) +' / 2019'

So SQL is trying to be helpful and convert the first string to an integer so it can add the two numbers together.
Tell SQL "these are all strings" and it will work fine:

SQL

CONCAT('404-Nivelacija MPC - ', (select max(redni_broj) from dbo.nivelacije_lista), ' / 2019')