How is the “order by” function used in MySQL?

In MySQL, the ORDER BY statement is used to sort the results of a query. It can sort by the values of one or more columns, and can specify ascending (ASC) or descending (DESC) order.

The children were too tired to finish their homework, so they decided to complete it in the morning.

The children were too exhausted to complete their homework, so they made the decision to finish it in the morning.

1. Sort by individual column.
2. Retrieve all data from the table and sort it in ascending order by the specified column.
3. Sort by multiple columns.
4. Retrieve all records from the table named “table_name” and order them in ascending order based on the values in “column1” and in descending order based on the values in “column2”.
5. You can use column index numbers instead of column names for sorting.
6. Retrieve all records from the table “table_name” and sort them in ascending order based on the first column.

注意事项：Instructions/Important Information:

1. The ORDER BY clause should be placed at the end of the SELECT statement.
2. If no sorting order is specified, the default is ascending (ASC).
3. You can use functions and expressions in the ORDER BY clause to sort the data.
4. If a table contains a large amount of data, using ORDER BY may result in slow query performance, so consider using an index to optimize the sorting operation.