how to concat in sql code example

Example 1: concatenation in sql

We use "||" to concatenation in Sql

example:
WHERE LOWER(FIRST_NAME || LAST_NAME)  LIKE '%d%' ;

Example 2: concat function in hana sql

SELECT CONCAT ('C', 'at') "concat" FROM DUMMY;

Example 3: concat two columns in sql server

select Convert(nvarchar(50),ID)+'-'+Convert(nvarchar(50),Year) as ID_Year from tablename