String Concatenation Does Not Work in SQLite

String concatenation does not work in SQLite

Try using || in place of +

select  locationname || '<p>' from location;

From SQLite documentation:

The || operator is "concatenate" - it joins together the two strings of its operands.

How to concatenate strings with padding in sqlite

The || operator is "concatenate" - it joins together the two strings of
its operands.

From http://www.sqlite.org/lang_expr.html

For padding, the seemingly-cheater way I've used is to start with your target string, say '0000', concatenate '0000423', then substr(result, -4, 4) for '0423'.

Update: Looks like there is no native implementation of "lpad" or "rpad" in SQLite, but you can follow along (basically what I proposed) here: http://verysimple.com/2010/01/12/sqlite-lpad-rpad-function/

-- the statement below is almost the same as
-- select lpad(mycolumn,'0',10) from mytable

select substr('0000000000' || mycolumn, -10, 10) from mytable

-- the statement below is almost the same as
-- select rpad(mycolumn,'0',10) from mytable

select substr(mycolumn || '0000000000', 1, 10) from mytable

Here's how it looks:

SELECT col1 || '-' || substr('00'||col2, -2, 2) || '-' || substr('0000'||col3, -4, 4)

it yields

"A-01-0001"
"A-01-0002"
"A-12-0002"
"C-13-0002"
"B-11-0002"

String concatenation in SQLITE with NA values?

If you are sure that subject_1 does not contain nulls then use coalesce only for subject_2:

select id,
  subject_1 || COALESCE(' ' || subject_2, '') new_col
from tablename 

See the demo.

Results:

| id  | new_col       |
| --- | ------------- |
| 1   | maths algebra |
| 2   | english       |
| 3   | french speech |

String concatenation as an alias displays 0 in SQLite?

Replace + with || wich is the string concatenation operator in SQLite and many other databases.

SELECT EmployeeID, FirstName || ', ' || LastName AS Name FROM Employees;

PHP - Issue with PDO using CONCAT() with SQLite

SQLite does not support the function CONCAT().

You will have to use the operator ||:

`IP` = IP || :param3

If you want to use the same code in MySql too, you will have to enable the PIPES_AS_CONCAT mode. This mode is by default disabled so the operator || is just an alias for the logical OR.

SQLite query not working with concatenated string

String query = "select * from table where col = \""+value+"\" ";

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