How do I concatenate two fields in n1ql? - nosql

Question

Is there a function in n1ql similar to mysql's concatenation that will allow me to concatenate two fields, such as:
select
firstName + " " + lastName
from table

Answer 1

From the N1QL documentation (https://developer.couchbase.com/documentation/server/current/n1ql/n1ql-language-reference/stringops.html):
N1QL provides the concatenation string operator. The result of the
concatenation operator is also a string.
expression || expression The following example shows concatenation of two strings.
Query:
SELECT fname || " " || lname AS full_name
FROM tutorial
Result:
{
"results": [
{
"full_name": "Dave Smith"
},
{
"full_name": "Earl Johnson"
},
{
"full_name": "Fred Jackson"
},
{
"full_name": "Harry Jackson"
},
{
"full_name": "Ian Taylor"
},
{
"full_name": "Jane Edwards"
}
]
}

Answer 2

If you want concatenate Integers should convert it first with TO_STRING:
SELECT 'My name is ' || fname || ' and my age is ' || TO_STRING(30) || ' years old' AS age
FROM app
{
"results": [
{
"age": "My name is Dave and my age is 30 years old"
},
{
"age": "My name is Earl and my age is 30 years old"
},
{
"age": "My name is Fred and my age is 30 years old"
},
{
"age": "My name is Harry and my age is 30 years old"
},
{
"age": "My name is Ian and my age is 30 years old"
},
{
"age": "My name is Jane and my age is 30 years old"
}
]
}