query snowflake from jupyter

Question

When I query

cs = con.cursor()
cs.execute("USE DATABASE DEV_TEST")
cs.execute(r"SELECT column_name FROM INFORMATION_SCHEMA.COLUMNS")

it retrieves the data but if I put a WHERE clause it returns nothing

cs.execute(r"SELECT column_name FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='TESTTABLE'")

Can you help me what I'm doing wrong

Note: TESTTABLE table exists in a right location

Answer 1

Enclose variable names in double quotes.

https://support.snowflake.net/s/question/0D50Z00008aREunSAG/what-is-the-difference-between-single-quotes-and-double-quotes-in-snowflake