Learning MySQL By Example

1. How to Retrieve Data From a Single Table

1.1. The Five Clauses of the SELECT Statement

1.2. Column Specifications

1.3. LIKE and REGEXP Operators

1.4. Arithmetic Operators

1.5. Column Aliases

1.6. Comparison Operators

1.7. IS NULL, BETWEEN, IN Operators

1.8. AND, OR, NOT Logical Operators

1.9. DISTINCT Clause

2. How to Retrieve Data from Multiple Tables

2.1. The JOIN Clause

2.2. Joining More Than Two Tables

2.3. The OUTER JOIN Clause

2.4. How to Code a UNION

3. Using Functions

3.1. Date Functions

3.2. Numeric Functions

3.3. String Functions

4. How to Insert, Update, Delete Data in Tables

4.1. The INSERT Clause With a Column List

4.2. The INSERT Clause Without a Column List

4.4. The DELETE Clause

5. Summary Queries and Aggregate Functions

5.1. Aggregate Functions

5.2. Grouping Data

5.3. Simple GROUP BY Query

5.4. Improving the GROUP BY Query

5.5. Using the HAVING Clause

5.5. Using the HAVING and WHERE Clauses Together

5.6. COUNT(column_name) and COUNT(*)

5.7. Using the DISTINCT Statement

6. Working With Subqueries

6.1. The Subquery In a SELECT Statement

6.2. The Subquery in an UPDATE statement

6.3. Create a Duplicate Table From An Existing Table

6.4. The Subquery In a Delete Statement

7.1. SQL View Explained

7.2. Benefits of Using Views

7.3. Views That Allow UPDATE Statements

8.1. SQL Indexes Explained

8.2. Clustered vs. Non-clustered Indexes

8.3. Create an Index in Workbench Using an ERD

8.4. How to Manually Add an Index to an Existing Table

4.4

The UPDATE Clause With a Column List

The UPDATE Clause

You can UPDATE single or multiple rows at a time.
In a SET clause, you define the column along with its new value that may be a literal value or an expression.
You can update one or all of the columns in a row.
You can use a subquery or WHERE clause in an UPDATE statement.

Code Sample:

1 USE world; 2 UPDATE city 3 SET Population = 65000, district = 'Aconcagua';

Results:

UPDATE city

You indicate the table you want to UPDATE.

SET Population = 65000, district = 'Aconcagua';

You indicate the table columns and associated values you want to change them to by using the equals sign ( = ).
You must separate each column and value with a comma.
There is no trailing comma

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Access it online or download it at https://books.byui.edu/learning_mysql/the_update_clause_wiv.