Oracle vs. SQL Server Why Oracle wins.Here is a brief comparison between Oracle 9i and SQL Server 2.In my view, Oracle comes out ahead in this c.By submitting your personal information, you agree that Tech.Target and its partners may contact you regarding relevant content, products and special offers.You also agree that your personal information may be transferred and processed in the United States, and that you have read and agree to the Terms of Use and the Privacy Policy.Platform dependency.SQL Server is only operable on the Windows platform, a major limitation for it to be an enterprise solution.E13167_01/aldsp/docs25/samples_tutorial/wwimages/figure19-14.gif' alt='Oracle Update Inner Join Syntax In Oracle' title='Oracle Update Inner Join Syntax In Oracle' />Oracle is available on multiple platforms such as Windows, all flavors of Unix from vendors such as IBM, Sun, Digital, HP, Sequent, etc.VAX VMS, as well as MVS.The multi platform nature of Oracle makes it a true enterprise solution.Locking and concurrency.SQL Server has no multi version consistency model, which means that writers block readers and readers block writers to ensure data integrity.In contrast, with Oracle, the rule is readers dont block writers and writers dont block readers.This is possible without compromising data integrity because Oracle will dynamically re create a read consistent image for a reader of any requested data that has been changed but not yet committed.In other words, the reader will see the data as it was before the writer began changing it until the writer commits.SQL Servers locking scheme is much simpler less mature and will result in a lot of delayswaits in a heavy OLTP environment.Also, SQL Server will escalate row locks to page level locks when too many rows on a page are locked.This locks rows which are uninvolved in any updates for no good reason.Performance and tuning.In SQL Server, the DBA has no real control over sorting and cache memory allocation.The memory allocation is decided only globally in the server properties memory folder, and that applies for ALL memory and not CACHING, SORTING, etc.All pages blocks are always 8k and all extents are always 8 pages 6.This means you have no way to specify larger extents to ensure contiguous space for large objects.ANSI+Joins+ANSI+defined+join+syntax+in+ANSI+SQL2+Standard+%281992%29.jpg' alt='Oracle Update Inner Join Syntax In Oracle' title='Oracle Update Inner Join Syntax In Oracle' />No range partioning of large tables and indexes.In Oracle, a large 1.GB table can be seamlessly partitioned at the database level into range partitions.For example, an invoice table can be partitioned into monthly partitions.Such partitioned tables and partitioned indexes give performance and maintenance benefits and are transparent to the application.There is no partitioning in SQL Server.There are no bitmap indexes in SQL Server.There are no reverse key indexes in SQL Server.There are no function based indexes in SQL Server.There is no star query optimization in SQL Server.Object types. Here are some object types missing in SQL Server that exist in Oracle.You cannot declare public or private synonyms.Update Using Inner Join in SQL Server.Using the same concept of Inner join, we can update rows in one table based on another table using Inner Join.Purpose. Use a SELECT statement or subquery to retrieve data from one or more tables, object tables, views, object views, or materialized views.If part or all of the.Free Oracle Magazine Subscriptions and Oracle White Papers Oracle Joins Version 11.Demo Tables Data Join Demo Tables CREATE TABLE person.In this post Ill show you how to do all the main types of Joins with clear SQL examples.The examples are written for Microsoft SQL Server, but very similar syntax.W2KKAfhggcA/hqdefault.jpg' alt='Oracle Update Inner Join Syntax In Oracle' title='Oracle Update Inner Join Syntax In Oracle' />There is no such thing as independent sequence objects.There are no packages i.No before event triggers only after event triggers and no row triggers only statement. Free Pdf To Microsoft Word Conversion . No object types like in PLSQL.PLSQL versus T SQLIn T SQL there are significant extensions to the ANSI SQL 9.The INNER JOIN, LEFT OUTER, RIGHT OUTER JOIN syntax differs from the classic JOIN.No Java database engine as in Oracle.Stored procedures in SQL Server are not compiled until executed which means overhead, late binding and finding errors at execution time only.No ability to readwrite from external files from a stored procedure.PLSQL has many DBMS system packages, where T SQL relies only on a limited number of extended and system stored procedures in the master database.PLSQL is better in error exception handling, and there is no such thing as exceptions in T SQL T SQL uses error not elegant.T SQL does not have the MINUS operator, that makes finding schema differences more difficult in SQL Server.In SQL Server there is no dead connection detection.Clients who lose their connection may still hold locks until a DBA is notified to kill their server side processes.In SQL Server there is no such thing as SQLNET aliasesservice namesThis means applications have to hard code the actual server name into their apps, making it difficult to move databases later to load balance across servers.Clustering technology.In clustering technology, Oracle is light years ahead, since SQL Server has nothing like Oracle Parallel ServerRAC two instances acting on the same data in active active configurations.And with the new version of Parallel Server in Oracle 9i, renamed as the Oracle Real Application Clusters, there is diskless contention handling of read read, read write, write read, and write write contention between the instances.This diskless contention handling is called Cache Fusion, and it means for the first time, any application can be placed in a cluster without any changes, and it scales upwards by just adding another machine to the cluster.Microsoft has nothing like this.Reliability. In SQL Server Standard Edition there is no ability to mirror the transaction log files.In Enterprise Edition there is a log shipping process that is not so reliable.If the logs fill up the disk, the database will crash hard.Sometimes this requires the server itself to be rebooted.Summary. SQL Server is clearly positioned between Microsoft Access and Oracle in terms of functionality, performance and scalability.It is a good workgroup level solution, a very quick time to market solution, and is very simple to use and administer.Oracle is much more advanced and has more to offer for larger applications with both OLTP and data warehouse applications.Its new clustering features are ideal for Application Service Providers ASPs on the Internet, who can now start with a cluster of two small servers and grow by just adding a server when they need to.Reader Feedback. Lucy L.I have worked with both and mostly agree with the authors observations, but I would like to mention the other side of this comment No before event triggers only after event triggers and no row triggers only statement.In SQL server, the statement level trigger gives you access to the pseudo tables INSERTED and DELETED.This means you can perform an action for each row operated on in a setwise fashion rather than in the row at a time fashion you must use in Oracle.This is a much better deal in bulk operations where an Oracle row level trigger can eat up much of the performance advantage of bulk inserts or updates.Balaji S. writes I think it is fundamentally wrong to compare SQL Server with Oracle.I agree with all the points mentioned in the article.Oracle is a more mature and advanced product than SQL Server.Also, I personally faced a problem when we implemented a CRM application over SQL Server.I was told that SQL Server has a limit on the size of the row and that if the row is greater than a certain size, then you need to split the row and insert into two tables with parent child relationship.This happened about a year back and I am not sure whether it is fixed or not.The company tried to migrate their CRM from Oracle to SQL Server but only ended up spending millions to find out that it is not going to work.They are continuing with Oracle now.Harvinder S. writes I found your article very informative.Here are some observations 1 Quote Also, SQL Server will escalate row locks to page level locks when too many rows on a page are locked.From my understanding, SQL Server never escalates row level lock to page level lock.It will aquire pagerow lock at the beginning and escalate to table level lock if needed.Quote In T SQL there are significant extensions to the ANSI SQL 9.The INNER JOIN, LEFT OUTER, RIGHT OUTER JOIN syntax differs from the classic JOIN.I find these extensions to be very beneficial for writing efficient code.I totally agree that SQL Server should have the following features Minus.Partitioning. Indexes bitmap, function based, etc.Better error handling.Better locking mechanism.I hope the next article will be show SQL Servers advantages over Oracle.Patrick M. writes Pure dribble.Clearly the author is an Oracle bigot.For someone that is certified in MS, he sure did get some major items wrong about MS SQL.Clearly he develops with Oracle and has only played with SQL Server, otherwise he would know better.Stored procs are compiled in MS SQL.Oracle Joins Where Clause Join Left Right Outer.INSERTINTO title VALUESBA, Bachelor of Arts INSERTINTO title VALUESBS, Bachelor of Science INSERTINTO title VALUESMS, Master of Science INSERTINTO title VALUESPh.D, Doctor of Philosophy INSERTINTO title VALUESMD, Doctor of Medicine INSERTINTO personpersonid, firstname, lastname, title1VALUES1, Daniel, Morgan, BS INSERTINTO person personid, firstname, lastname, title1VALUES2, Jack, Cline, BA INSERTINTO person personid, firstname, lastname, title1VALUES3, Muriel, Dance, Ph.D INSERTINTO person personid, firstname, lastname, title1VALUES4, Elizabeth, Scott, MS INSERTINTO person personid, firstname, lastnameVALUES5, Jacqueline, Stough INSERTINTO personrole VALUES 1, Administrator INSERTINTO personrole VALUES 2, Professor INSERTINTO personrole VALUES 3, Instructor INSERTINTO personrole VALUES 4, Employee INSERTINTO personrole VALUES 5, Student INSERTINTO personrole VALUES 9, Alumni CREATE SEQUENCE seqprid START WITH 1 INSERTINTO personroleie VALUESseqprid.NEXTVAL, 1, 2 INSERTINTO personroleie VALUESseqprid.NEXTVAL, 1, 9 INSERTINTO personroleie VALUESseqprid.NEXTVAL, 2, 3 INSERTINTO personroleie VALUESseqprid.NEXTVAL, 1, 5 INSERTINTO personroleie VALUESseqprid.NEXTVAL, 3, 1 INSERTINTO personroleie VALUESseqprid.NEXTVAL, 3, 9 INSERTINTO personroleie VALUESseqprid.NEXTVAL, 4, 4 INSERTINTO personroleie VALUESseqprid.NEXTVAL, 5, 5 INSERTINTO personroleie VALUESseqprid.NEXTVAL, 5, 9 COMMIT.
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