SQLITE ORDER BY CODE

The following SQL statement selects all the columns from the Customers table, sorted by the. There can be multiple attributes to sort by, Use English commas, separate Īccording to the order of attributes, they are listed in order by After that To sort the records in descending order, use the DESC keyword. The result of the above second run on the command line is to press the tuple first sdept In descending order, Press again sage In ascending order. The 'NOT INDEXED' clause specifies that no index shall be used when accessing the preceding table. If index-name does not exist or cannot be used for the query, then the preparation of the SQLite statement fails. > select * from student order by sdept desc, sage asc The 'INDEXED BY index-name' clause specifies that the named index must be used in order to look up values on the preceding table. The default is ascending asc）, Then press sage In descending order. The above results run on the command line, First press the tuple first sdept In ascending order （ The sorting method is not specified. > select * from student order by sdept, sage desc Here is an example, It will press the result NAME Sort in descending order ： sqlite> SELECT * FROM COMPANY ORDER BY NAME DESC If an order is specified by the ORDER BY clause, the rows are then sorted by the specified data in either ascending or descending order. Here is an example, It will press the result NAME and SALARY Sort in ascending order ： sqlite> SELECT * FROM COMPANY ORDER BY NAME, SALARY ASC This will produce the following results ： ID NAME AGE ADDRESS SALARY Here is an example, It will press the result SALARY Sort in ascending order ： sqlite> SELECT * FROM COMPANY ORDER BY SALARY ASC SELECT column-list FROM tablename WHERE condition ORDER BY column1, column2. Syntax Following is the syntax of the ORDER BY clause in SQLite. P.D.: La interfaz está sin terminar jeje. By default, this clause sorts results in ascending order, if you need to arrange them in descending order you need to use DESC explicitly. For example: SELECT employeeid, lastname, firstname FROM employees WHERE employeeid > 45 ORDER BY 3 DESC This SQLite ORDER BY would return the result set sorted by the. Por lo que casi seguro tiene que ver con SQLite, pero no doy con la solución. You can also use the SQLite ORDER BY clause to sort by relative position in the result set, where the first field in the result set is 1. Suppose COMPANY The table has the following records ： ID NAME AGE ADDRESS SALARY Tras debuggear esta función pude comprobar que la consulta a base de datos desde la tablet ya devuelve las tuplas mal ordenadas. Make sure the sort you use is listed in the column list. You can ORDER BY Use multiple columns in clause. ORDER BY The basic syntax of the clause is as follows ： SELECT column-list By default the order is always ASC ( Ascending ).īoth class and mark columns are in descending order.SQLite of ORDER BY Clause is used to arrange data in ascending or descending order based on one or more columns. We can use ASC for ascending order and DESC for descending order against each columns. Here is the output or error message we will get.Įrror: no such column: class1 Using ASC and DESC Let us change the query to q='SELECT * FROM student ORDER BY class1,mark', Note that there is no column as class1. Q='SELECT * FROM student ORDER BY class,mark ' So first the order will be using class column and then within the class column mark is used from lowest ( mark ) to highest ( mark ) to order the records. In our query we will use two columns class and mark.

We can display error message if there is any error by using try except. Q='SELECT id,name,class,mark,sex FROM student ORDER BY class DESC'

SQLITE ORDER BY CODE

In above code we changed the query part only by adding DESC. We can reverse the order ( from Z to A ) by using DESC. Print(row,row,row,row,row)īased on alphabetical forward order (from A to Z ) we displayed records based on class column in above code. Q='SELECT id,name,class,mark,sex FROM student ORDER BY class' As class column is storing text data, we will display rows in alphabetical order of class column. Order by query will take one or more column as input.

Sqlite order by