Search results
Results from the WOW.Com Content Network
In SQL procedures, a cursor makes it possible to define a result set (a set of data rows) and perform complex logic on a row by row basis. By using the same mechanics, a SQL procedure can also define a result set and return it directly to the caller of the SQL procedure or to a client application.
Example (using Python and SQLite): cursor.execute("SELECT * FROM users WHERE username = ? AND password = ?", (user_input, password_input)) ... which then return the results. Stored procedures also ...
Major DBMSs, including SQLite, [5] MySQL, [6] Oracle, [7] IBM Db2, [8] Microsoft SQL Server [9] and PostgreSQL [10] support prepared statements. Prepared statements are normally executed through a non-SQL binary protocol for efficiency and protection from SQL injection, but with some DBMSs such as MySQL prepared statements are also available using a SQL syntax for debugging purposes.
Stored procedures may return result sets, i.e., the results of a SELECT statement. Such result sets can be processed using cursors, by other stored procedures, by associating a result-set locator, or by applications. Stored procedures may also contain declared variables for processing data and cursors that allow it to loop through multiple rows ...
A cursor is a pointer to a private SQL area that stores information coming from a SELECT or data manipulation language (DML) statement (INSERT, UPDATE, DELETE, or MERGE). A cursor holds the rows (one or more) returned by a SQL statement. The set of rows the cursor holds is referred to as the active set. [12] A cursor can be explicit or implicit ...
cursor = connection. cursor cursor. execute ("UPDATE ph SET nm='aaron' WHERE nm='arw'") cursor. execute ("SELECT * FROM ph") for x in cursor. fetchall (): print x # prints ('aaron', '3367') If the user does not want to commit updates then the do not execute a commit on the connection object (which writes out the tables).
Then see how your choice ranks and share the results with your friends. Check back each day this week to pick your Most Memorable Moments of 2024. Thanks for playing! Read On The Fox News App.
Storm is a Python programming library for object-relational mapping between one or more SQL databases and Python objects. It allows Python developers to formulate complex queries spanning multiple database tables to support dynamic storage and retrieval of object information.