Question: I don't understand please. CHALLENGE ACTIVITY 4.5.1: Column constraints. Jump to level 1 3 CREATE TABLE Country ISO Code3 CHAR(3) Name VARCHAR(15), Capital VARCHAR(15) NOT

I don't understand please. CHALLENGE ACTIVITY 4.5.1: Column constraints. Jump to

I don't understand please.

CHALLENGE ACTIVITY 4.5.1: Column constraints. Jump to level 1 3 CREATE TABLE Country ISO Code3 CHAR(3) Name VARCHAR(15), Capital VARCHAR(15) NOT NULL, TLD CHAR(3) NOT NULL, Continent VARCHAR(8), Over65PopPct FLOAT, PRIMARY KEY (ISOCode3) D: Which columns can contain NULL values? Capital Name Over65PopPct ISO Code3 Continent TLD 1 2 3 4 5 Check Next

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