Which of t ...
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Which of the following table definitions guarantee that column с1 cannot contain NULL values? Pick all applicable options.
CREATE TABLE z1 (c1 INT DEFAULT 0)
CREATE TABLE z1 (c1 INT PRIMARY KEY)
CREATE TABLE z1 (c1 INT NOT NULL)
CREATE TABLE z1 (c1 INT)
PRIMARY KEY cannot contain NULL values
What is the difference between a unique key and primary key?...
SQL UNIQUE Constraint
SQL PRIMARY KEY Constraint
Which of these is not a valid constraint?...
What is primary key in SQL? Pick the most correct definition....
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