About the Order by :
order by statement to sort the result set according to the specified column, in ascending order by default.
1. select field names from table where conditions order by field name 1 asc / desc, field name 2 asc (ascending, default) / desc (descending), .......
2. select field names from table where field conditions order by ID asc / desc, field number asc / desc, ....... (field number starting from 1)
Finally, note that at the time of order by using EDITORIAL field will first execute , for example:
SELECT sno, sname, sex, brithday, dno FROM student ORDER BY 4,5 DESC; // sentence of the fourth column (date column) in ascending order of priority (default), only the column with the same value (1983-10-04 ), the fifth column before descending order according to the statement.
SELECT sno, sname, sex, brithday, dno FROM student ORDER BY 5,4 DESC; / * * column 5 ascending /
