Count number of elements in TEXT[]

Question

I am pretty new to SQL and I was wondering if there is a way to count the number of elements in a text column, such as this on psql:

database => SELECT * FROM volume LIMIT 2;

id	column2
0	{"abc", "def", "ghi", "jkl"}
1	{"abc", "def", "ghi"}

(2 rows)

Here, I would like to count the number of elements in the second variable, in total (over the whole dataset)

Answer 1

I usually use cardinality :

select cardinality(col2)