apache

This chapter teaches you how to create and drop procedures in Derby. Creating a procedure You can create a procedure using the CREATE PROCEDURE statement. Syntax Following is the syntax…

An index in a table is nothing but a pointer to its data. These are used to speed up the data retrieval from a table. If we use indexes, the…

The ALTER TABLE statement, allows you to alter an existing table. Using this you can do the following − Add a column, add a constraintDrop a column, drop a constraintChange…

The HAVING Clause enables you to specify conditions that filter which group results appear in the results. The WHERE clause places conditions on the selected columns, whereas the HAVING clause…

The ORDER BY clause is used to arrange the contents of the result set in the order it uses the keywords, ASC representing ascending order and DESC representing descending order.…

The WHERE clause is used in the SELECT, DELETE or, UPDATE statements to specify the rows on which the operation needs to be carried out. Usually, this clause is followed…

The DELETE statement is used to delete rows of a table. Just like the UPDATE statement, Apache Derby provides two types of Delete (syntax): searched delete and positioned delete. The searched delete statement deletes…

The UPDATE statement is used to update data in a table. Apache Derby provides two types of updates (syntax) namely searched update and positioned update. The searched UPDATE statement updates all the specified columns…

The SELECT statement is used to retrieve data from a table. This returns the data in the form of a table known as result set. Syntax Following is the syntax…

The insert query inserts data: new records, into the table. Syntax Following is the basic syntax of the INSERT statement − ij>INSERT INTO table_name VALUES (column_name1, column_name2, ...); where column1, column2…