2.2 Update, Insert, Delete Stored Procedure Examples
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Not ACID, Not BASE, but SALT a Transaction Processing Perspective on Blockchains
Not ACID, not BASE, but SALT A Transaction Processing Perspective on Blockchains Stefan Tai, Jacob Eberhardt and Markus Klems Information Systems Engineering, Technische Universitat¨ Berlin fst, je, [email protected] Keywords: SALT, blockchain, decentralized, ACID, BASE, transaction processing Abstract: Traditional ACID transactions, typically supported by relational database management systems, emphasize database consistency. BASE provides a model that trades some consistency for availability, and is typically favored by cloud systems and NoSQL data stores. With the increasing popularity of blockchain technology, another alternative to both ACID and BASE is introduced: SALT. In this keynote paper, we present SALT as a model to explain blockchains and their use in application architecture. We take both, a transaction and a transaction processing systems perspective on the SALT model. From a transactions perspective, SALT is about Sequential, Agreed-on, Ledgered, and Tamper-resistant transaction processing. From a systems perspec- tive, SALT is about decentralized transaction processing systems being Symmetric, Admin-free, Ledgered and Time-consensual. We discuss the importance of these dual perspectives, both, when comparing SALT with ACID and BASE, and when engineering blockchain-based applications. We expect the next-generation of decentralized transactional applications to leverage combinations of all three transaction models. 1 INTRODUCTION against. Using the admittedly contrived acronym of SALT, we characterize blockchain-based transactions There is a common belief that blockchains have the – from a transactions perspective – as Sequential, potential to fundamentally disrupt entire industries. Agreed, Ledgered, and Tamper-resistant, and – from Whether we are talking about financial services, the a systems perspective – as Symmetric, Admin-free, sharing economy, the Internet of Things, or future en- Ledgered, and Time-consensual. -
Support Aggregate Analytic Window Function Over Large Data by Spilling
Support Aggregate Analytic Window Function over Large Data by Spilling Xing Shi and Chao Wang Guangdong University of Technology, Guangzhou, Guangdong 510006, China North China University of Technology, Beijing 100144, China Abstract. Analytic function, also called window function, is to query the aggregation of data over a sliding window. For example, a simple query over the online stock platform is to return the average price of a stock of the last three days. These functions are commonly used features in SQL databases. They are supported in most of the commercial databases. With the increasing usage of cloud data infra and machine learning technology, the frequency of queries with analytic window functions rises. Some analytic functions only require const space in memory to store the state, such as SUM, AVG, while others require linear space, such as MIN, MAX. When the window is extremely large, the memory space to store the state may be too large. In this case, we need to spill the state to disk, which is a heavy operation. In this paper, we proposed an algorithm to manipulate the state data in the disk to reduce the disk I/O to make spill available and efficiency. We analyze the complexity of the algorithm with different data distribution. 1. Introducion In this paper, we develop novel spill techniques for analytic window function in SQL databases. And discuss different various types of aggregate queries, e.g., COUNT, AVG, SUM, MAX, MIN, etc., over a relational table. Aggregate analytic function, also called aggregate window function, is to query the aggregation of data over a sliding window. -
Object-Oriented Design of Database Stored Procedures (PDF)
Object-Oriented Design of Database Stored Procedures Michael Blaha, [email protected] Bill Huth, [email protected] Peter Cheung, [email protected] Abstract base I/O. One nice feature of SPs is their support for op- tional input parameters. An SP may have optional inputs Object-oriented (OO) software engineering techniques are if: (1) the definition lists all outputs before inputs and (2) often used with programming languages, but they also ap- optional inputs have default values. ply to relational databases. OO techniques are not only helpful for determining database structure, but also for de- 3. Financial Application Example signing stored procedure code. In fact, we were surprised by the magnitude of the stored procedure benefits. OO The examples in this article are based on an application for techniques boost development productivity as well as the managing syndicated loans. The loans can be huge, involv- quality, clarity, and maintainability of the resulting code. ing billions of dollars, and can arise from lending to gov- ernments and multinational corporations. Participation in a 1. Introduction loan must be spread across multiple lenders because the risk is too large for a single lender. Object-oriented (OO) techniques are versatile. They are not Figure 1 shows an excerpt of a UML class model for only helpful for developing programs and structuring data- the application. An Asset is something of value and can be bases, but they are also effective for designing stored proce- a Currency (such as US Dollars, Euros, and Yen), a Loan- dures. A stored procedure is programming code that runs in Instrument, or an OtherAsset (such as bonds and stock). -
10 Weeks to 0 Vulnerabilities Program
10 WEEKS TO 0 CRITICAL VULNERABILITIES INJECTION ATTACKS Sherif Koussa @skoussa 1 HOUSEKEEPING • Why we’re all here • Recording for internal training purposes • Slides will be provided after the session • Your mic will be muted, please use “Q&A” for any questions 2 ABOUT ME 2006 2008 2010 Joined SANS Mentor & Founded OWASP GIAC Consultant Software Secured 1999 2007 2009 2019 Software Founded Wells Fargo Founded Development OWASP Chapter Security Engineer Reshift Security Certifications: GSSP-Java, GSSP-NET, GWAPT 3 Reshift integrates with your modern software development pipeline to help your team find and fix vulnerabilities. Penetration Testing as a Service company based out of Ottawa, Canada. 4 10 WEEK SCHEDULE 1. April 10th: Injection 2. April 17th : Broken Authentication 3. April 24th: Sensitive data Exposure 4. May 1st : External Entity Injection 5. May 8th : Broken Access Control 6. May 15th: Security Misconfiguration 7. May 22nd: Cross-site Scripting 8. May 29th: Insecure Deserialization 9. June 5th: Using Components with Known Vulnerabilities 10. June 12th: Insufficient Logging and Monitoring 5 SESSION 1: AGENDA 1.What are Injection Attacks and their impacts 2.Injection Theory 3.Types of Injection Attacks: • SQL Injection (Exercise) • JavaScript Server Side Injection • NoSQL Injection 5.Injection Attacks Mitigation 6. Tools and Resources 6 WHAT ARE INJECTION ATTACKS Injection attacks denote a wide range of attacks targeting the server, where the attacker supplies untrusted input to software. This gets processed by an interpreter -
Polymorphic Stored Procedure? Venkat Subramaniam [email protected]
Polymorphic Stored Procedure? Venkat Subramaniam [email protected] http://www.durasoftcorp.com/download Abstract A typical user of JDBC or ASP.NET issues a SQL query to the underlying database, grabs the fields returned by the record set/result set (or dataset) and then populates an object with the data fetched. Not considering the use of Entity Beans and JDO in Java, what does one do if the object being fetched is one of several types derived from a common base type? This article addresses one way this can be solved in an extensible manner. A Simple Data Access Scenario For some one who has spent significant time developing OO applications that used object-oriented databases and those that did not use any database at all, it is painful to use a relational database with objects. I am sure you have heard people with OODBMS experience talk about data access impedance mismatch when it comes to storing an object in a relational database. You hear less of this now than you did in the early nineties. While there is some market for ODBMS still, I have come to agree that relational databases are here to stay. After developing a couple of applications using relational databases, I was pondering about arriving at a solution to the problem of mapping the inheritance hierarchy in an extensible way. Is this really a good approach to follow, is for you to decide. I simply present here my thoughts on what I tried recently. Your comments are most welcome. Let’s consider a database with four tables: Customer, Account, CheckingAccount, SavingsAccount. -
SQL and Management of External Data
SQL and Management of External Data Jan-Eike Michels Jim Melton Vanja Josifovski Oracle, Sandy, UT 84093 Krishna Kulkarni [email protected] Peter Schwarz Kathy Zeidenstein IBM, San Jose, CA {janeike, vanja, krishnak, krzeide}@us.ibm.com [email protected] SQL/MED addresses two aspects to the problem Guest Column Introduction of accessing external data. The first aspect provides the ability to use the SQL interface to access non- In late 2000, work was completed on yet another part SQL data (or even SQL data residing on a different of the SQL standard [1], to which we introduced our database management system) and, if desired, to join readers in an earlier edition of this column [2]. that data with local SQL data. The application sub- Although SQL database systems manage an mits a single SQL query that references data from enormous amount of data, it certainly has no monop- multiple sources to the SQL-server. That statement is oly on that task. Tremendous amounts of data remain then decomposed into fragments (or requests) that are in ordinary operating system files, in network and submitted to the individual sources. The standard hierarchical databases, and in other repositories. The does not dictate how the query is decomposed, speci- need to query and manipulate that data alongside fying only the interaction between the SQL-server SQL data continues to grow. Database system ven- and foreign-data wrapper that underlies the decompo- dors have developed many approaches to providing sition of the query and its subsequent execution. We such integrated access. will call this part of the standard the “wrapper inter- In this (partly guested) article, SQL’s new part, face”; it is described in the first half of this column. -
SQL Stored Procedures
Agenda Key:31MA Session Number:409094 DB2 for IBM i: SQL Stored Procedures Tom McKinley ([email protected]) DB2 for IBM i consultant IBM Lab Services 8 Copyright IBM Corporation, 2009. All Rights Reserved. This publication may refer to products that are not currently available in your country. IBM makes no commitment to make available any products referred to herein. What is a Stored Procedure? • Just a called program – Called from SQL-based interfaces via SQL CALL statement • Supports input and output parameters – Result sets on some interfaces • Follows security model of iSeries – Enables you to secure your data – iSeries adopted authority model can be leveraged • Useful for moving host-centric applications to distributed applications 2 © 2009 IBM Corporation What is a Stored Procedure? • Performance savings in distributed computing environments by dramatically reducing the number of flows (requests) to the database engine – One request initiates multiple transactions and processes R R e e q q u u DB2 for i5/OS DB2DB2 for for i5/OS e e AS/400 s s t t SP o o r r • Performance improvements further enhanced by the option of providing result sets back to ODBC, JDBC, .NET & CLI clients 3 © 2009 IBM Corporation Recipe for a Stored Procedure... 1 Create it CREATE PROCEDURE total_val (IN Member# CHAR(6), OUT total DECIMAL(12,2)) LANGUAGE SQL BEGIN SELECT SUM(curr_balance) INTO total FROM accounts WHERE account_owner=Member# AND account_type IN ('C','S','M') END 2 Call it (from an SQL interface) over and over CALL total_val(‘123456’, :balance) 4 © 2009 IBM Corporation Stored Procedures • DB2 for i5/OS supports two types of stored procedures 1. -
Case in Insert Statement Sql
Case In Insert Statement Sql Unreleased Randal disbosoms: he despond his lordolatry negligibly and connectively. Is Dale black-and-white when Willi intertraffic bimanually? Goddard still spirit ideographically while untenable Vernor belove that banquettes. This case statement in sql case insert into a safe place. For sql server database must be inserted row to retain in tables created in other hand side of a rating from a real work properly. Getting rows of specific columns from existing table by using CASE statement with ORDER BY clause. FYI, your loan may vary. Given a sql users view to update and inserts. As shown in excel above denote, the insertion of deceased in permanent new ship from the existing table was successful. Is used to query techniques, though an interval to their firms from emp_master table? By inserting rows to insert a single value in for a equality expressions, we have inserted into another table variables here, false predicate is true. Count function can actually gain a dress in gates the join produces a founder of consent. Migration solutions for only those values? Instead of in case insert statement sql sql for each programming. Salesforce logos and inserts new row. In PROC SQL, you can do the same with CREATE TABLE and INSERT INTO statement. Sometimes goods might develop to focus during a portion of the Publishers table, such trust only publishers that register in Vancouver. Net mvc with this article has, and you may then correspond to. Please leave your head yet so unsure if. If ELSE was not offend and none set the Boolean_expression return which, then Null will be displayed. -
SQL/PSM Stored Procedures Basic PSM Form Parameters In
Stored Procedures PSM, or “persistent, stored modules,” SQL/PSM allows us to store procedures as database schema elements. PSM = a mixture of conventional Procedures Stored in the Database statements (if, while, etc.) and SQL. General-Purpose Programming Lets us do things we cannot do in SQL alone. 1 2 Basic PSM Form Parameters in PSM CREATE PROCEDURE <name> ( Unlike the usual name-type pairs in <parameter list> ) languages like C, PSM uses mode- <optional local declarations> name-type triples, where the mode can be: <body>; IN = procedure uses value, does not Function alternative: change value. CREATE FUNCTION <name> ( OUT = procedure changes, does not use. <parameter list> ) RETURNS <type> INOUT = both. 3 4 1 Example: Stored Procedure The Procedure Let’s write a procedure that takes two CREATE PROCEDURE JoeMenu ( arguments b and p, and adds a tuple IN b CHAR(20), Parameters are both to Sells(bar, beer, price) that has bar = IN p REAL read-only, not changed ’Joe’’s Bar’, beer = b, and price = p. ) Used by Joe to add to his menu more easily. INSERT INTO Sells The body --- VALUES(’Joe’’s Bar’, b, p); a single insertion 5 6 Invoking Procedures Types of PSM statements --- (1) Use SQL/PSM statement CALL, with the RETURN <expression> sets the return name of the desired procedure and value of a function. arguments. Unlike C, etc., RETURN does not terminate Example: function execution. CALL JoeMenu(’Moosedrool’, 5.00); DECLARE <name> <type> used to declare local variables. Functions used in SQL expressions wherever a value of their return type is appropriate. -
Sql Statement Used to Update Data in a Database
Sql Statement Used To Update Data In A Database Beaufort remains foresightful after Worden blotted drably or face-off any wodge. Lyophilised and accompanied Wait fleyed: which Gonzales is conceived enough? Antibilious Aub never decolorising so nudely or prickles any crosiers alluringly. Stay up again an interval to rome, prevent copying data source code specifies the statement used to sql update data in database because that can also use a row for every row deletion to an answer The alias will be used in displaying the name. Which SQL statement is used to update data part a database MODIFY the SAVE draft UPDATE UPDATE. Description of the illustration partition_extension_clause. Applicable to typed views, the ONLY keyword specifies that the statement should apply only future data use the specified view and rows of proper subviews cannot be updated by the statement. This method allows us to copy data from one table then a newly created table. INSERT specifies the table or view that data transfer be inserted into. If our users in the update statement multiple users to update, so that data to in sql update statement used a database to all on this syntax shown below so that they are. Already seen an account? DELETE FROM Employees; Deletes all the records from master table Employees. The type for the queries to design window that to sql update data in a database company is sql statement which will retrieve a time, such a new value. This witch also allows the caller to store turn logging on grid off. Only one frame can edit a dam at original time. -
JDBC Mock Test
JJDDBBCC MMOOCCKK TTEESSTT http://www.tutorialspoint.com Copyright © tutorialspoint.com This section presents you various set of Mock Tests related to JDBC Framework. You can download these sample mock tests at your local machine and solve offline at your convenience. Every mock test is supplied with a mock test key to let you verify the final score and grade yourself. JJDDBBCC MMOOCCKK TTEESSTT IIIIII Q 1 - Which of the following is used generally used for altering the databases? A - boolean execute B - ResultSet executeQuery C - int executeUpdate D - None of the above. Q 2 - How does JDBC handle the data types of Java and database? A - The JDBC driver converts the Java data type to the appropriate JDBC type before sending it to the database. B - It uses a default mapping for most data types. C - Both of the above. D - None of the above. Q 3 - Which of the following can cause 'No suitable driver' error? A - Due to failing to load the appropriate JDBC drivers before calling the DriverManager.getConnection method. B - It can be specifying an invalid JDBC URL, one that is not recognized by JDBC driver. C - This error can occur if one or more the shared libraries needed by the bridge cannot be loaded. D - All of the above. Q 4 - Why will you set auto commit mode to false? A - To increase performance. B - To maintain the integrity of business processes. C - To use distributed transactions D - All of the above. Q 5 - Which of the following is correct about savepoint? A - A savepoint marks a point that the current transaction can roll back to. -
Query Processing for SQL Updates
Query Processing for SQL Updates Cesar´ A. Galindo-Legaria Stefano Stefani Florian Waas [email protected] [email protected] fl[email protected] Microsoft Corp., One Microsoft Way, Redmond, WA 98052 ABSTRACT tradeoffs between plans that do serial or random I/Os. This moti- A rich set of concepts and techniques has been developed in the vates the integration of update processing in the general framework context of query processing for the efficient and robust execution of query processing. To be successful, this integration needs to of queries. So far, this work has mostly focused on issues related model update processing in a suitable way and consider the special to data-retrieval queries, with a strong backing on relational alge- requirements of updates. One of the few papers in this area is [2], bra. However, update operations can also exhibit a number of query which deals with delete operations, but there is little documented processing issues, depending on the complexity of the operations on the integration of updates with query processing, to the best of and the volume of data to process. Such issues include lookup and our knowledge. matching of values, navigational vs. set-oriented algorithms and In this paper, we present an overview of the basic concepts used trade-offs between plans that do serial or random I/Os. to support SQL Data Manipulation Language (DML) by the query In this paper we present an overview of the basic techniques used processor in Microsoft SQL Server. We focus on the query process- to support SQL DML (Data Manipulation Language) in Microsoft ing aspects of the problem, how data is modeled, primitive opera- SQL Server.