Find all the cities whose humidity is 89

Introduction to SQL
Find all the cities whose humidity is 89

SELECT city WHERE humidity = 89;

SELECT city FROM weather WHERE humidity = 89;

SELECT humidity = 89 FROM weather;

SELECT city FROM weather;

SELECT city WHERE humidity = 89;

SELECT city FROM weather WHERE humidity = 89;

SELECT humidity = 89 FROM weather;

SELECT city FROM weather;

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Introduction to SQL
The SQL statementSELECT ROUND(45.926, -1) FROM DUAL;

prints garbage

is illegal

prints 045.926

prints 50

prints garbage

is illegal

prints 045.926

prints 50

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Introduction to SQL
The qualifier DISTINCT must be used in an SQL statement when we want to eliminate duplicate rows.

False

True

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Introduction to SQL
What is a view?

A view is a virtual table which results of executing a pre-compiled query. A view is not part of the physical database schema, while the regular tables are.

A view is a database diagram.

None of these

A view is a special stored procedure executed when certain event occurs.

A view is a virtual table which results of executing a pre-compiled query. A view is not part of the physical database schema, while the regular tables are.

A view is a database diagram.

None of these

A view is a special stored procedure executed when certain event occurs.

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Introduction to SQL
The SELECT command, with its various clauses, allows users to query the data contained in the tables and ask many different questions or ad hoc queries.

True

False

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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.

all columns of the table are to be returned.

None of these

all records with even partial criteria met are to be returned.

all records meeting the full criteria are to be returned.

all columns of the table are to be returned.

None of these

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Introduction to SQL

Introduction to SQL Find all the cities whose humidity is 89

Introduction to SQL The SQL statementSELECT ROUND(45.926, -1) FROM DUAL;

Introduction to SQL The qualifier DISTINCT must be used in an SQL statement when we want to eliminate duplicate rows.

Introduction to SQL What is a view?

Introduction to SQL The SELECT command, with its various clauses, allows users to query the data contained in the tables and ask many different questions or ad hoc queries.

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

Introduction to SQL
Find all the cities whose humidity is 89

Introduction to SQL
The SQL statementSELECT ROUND(45.926, -1) FROM DUAL;

Introduction to SQL
The qualifier DISTINCT must be used in an SQL statement when we want to eliminate duplicate rows.

Introduction to SQL
What is a view?

Introduction to SQL
The SELECT command, with its various clauses, allows users to query the data contained in the tables and ask many different questions or ad hoc queries.

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