Introduction to SQL
In an SQL SELECT statement querying a single table, according to the SQL-92 standard the asterisk (*) means that:

all records with even partial criteria met are to be returned.
all records meeting the full criteria are to be returned.
None of these
all columns of the table are to be returned.

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Introduction to SQL
Find the SQL statement below that is equal to the following: SELECT NAME FROM CUSTOMER WHERE STATE = 'VA';

SELECT NAME FROM CUSTOMER WHERE STATE IN ('VA');
SELECT NAME IN CUSTOMER WHERE STATE = 'V';
SELECT NAME IN CUSTOMER WHERE STATE = 'VA';
SELECT NAME IN CUSTOMER WHERE STATE IN ('VA');

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Introduction to SQL
Find the name of all cities with their temperature, humidity and countries.

SELECT weather.city, temperature, humidity, country FROM weather, location WHERE weather.city = location.city;
SELECT weather.city, temperature, humidity, country FROM weather, location;
SELECT city, temperature, humidity, country FROM location;
SELECT weather.city, temperature, humidity FROM weather SELECT country FROM location WHERE weather.city = location.city;

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