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Question

DO:

This SQL Server AND condition example would return all rows where the first_name in the employees table is 'Sarah'. And the employees and contacts tables are joined on the employee_id from the employees table and the contact_id from the contacts table. You will notice that all of the fields are prefixed with the table names (ie: contacts.last_name). This is required to eliminate any ambiguity as to which field is being referenced; as the same field name can exist in both the employees and the contacts tables.

In this case, the result set would only display the employee_id and last_name fields (as listed in the first part of the SELECT statement.).

Answer
SELECT employees.employee_id, contacts.last_name
FROM employees
INNER JOIN contacts
ON employees.employee_id = contacts.contact_id
WHERE employees.first_name = 'Sarah';

This SQL Server AND condition example would return all rows where the first_name in the employees table is 'Sarah'. And the employees and contacts tables are joined on the employee_id from the employees table and the contact_id from the contacts table. You will notice that all of the fields are prefixed with the table names (ie: contacts.last_name). This is required to eliminate any ambiguity as to which field is being referenced; as the same field name can exist in both the employees and the contacts tables.

In this case, the result set would only display the employee_id and last_name fields (as listed in the first part of the SELECT statement.).


Question

DO:

This SQL Server AND condition example would return all rows where the first_name in the employees table is 'Sarah'. And the employees and contacts tables are joined on the employee_id from the employees table and the contact_id from the contacts table. You will notice that all of the fields are prefixed with the table names (ie: contacts.last_name). This is required to eliminate any ambiguity as to which field is being referenced; as the same field name can exist in both the employees and the contacts tables.

In this case, the result set would only display the employee_id and last_name fields (as listed in the first part of the SELECT statement.).

Answer
?

Question

DO:

This SQL Server AND condition example would return all rows where the first_name in the employees table is 'Sarah'. And the employees and contacts tables are joined on the employee_id from the employees table and the contact_id from the contacts table. You will notice that all of the fields are prefixed with the table names (ie: contacts.last_name). This is required to eliminate any ambiguity as to which field is being referenced; as the same field name can exist in both the employees and the contacts tables.

In this case, the result set would only display the employee_id and last_name fields (as listed in the first part of the SELECT statement.).

Answer
SELECT employees.employee_id, contacts.last_name
FROM employees
INNER JOIN contacts
ON employees.employee_id = contacts.contact_id
WHERE employees.first_name = 'Sarah';

This SQL Server AND condition example would return all rows where the first_name in the employees table is 'Sarah'. And the employees and contacts tables are joined on the employee_id from the employees table and the contact_id from the contacts table. You will notice that all of the fields are prefixed with the table names (ie: contacts.last_name). This is required to eliminate any ambiguity as to which field is being referenced; as the same field name can exist in both the employees and the contacts tables.

In this case, the result set would only display the employee_id and last_name fields (as listed in the first part of the SELECT statement.).

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SQL Server: AND Condition
id = contacts.contact_id AND employees.first_name = 'Sarah'; Though the above SQL works just fine, you would more traditionally write this SQL as follows using a proper INNER JOIN. For example: <span>SELECT employees.employee_id, contacts.last_name FROM employees INNER JOIN contacts ON employees.employee_id = contacts.contact_id WHERE employees.first_name = 'Sarah'; This SQL Server AND condition example would return all rows where the first_name in the employees table is 'Sarah'. And the employees and contacts tables are joined on the employee_id from the employees table and the contact_id from the contacts table. You will notice that all of the fields are prefixed with the table names (ie: contacts.last_name). This is required to eliminate any ambiguity as to which field is being referenced; as the same field name can exist in both the employees and the contacts tables. In this case, the result set would only display the employee_id and last_name fields (as listed in the first part of the SELECT statement.). Example - With INSERT Statement This next SQL Server AND example demonstrates how the AND condition can be used in the INSERT statement . For example: INSERT INTO contacts (contact_id,

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