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Information Storage and Retrieval: January 2014
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Enter your search terms. Information Storage and Retrieval. Saturday, January 25, 2014. Statistics is the science of collecting,organizing, summarizing, analyzing and interpreting data. Take numerical values whose "size" is meaningful. Quantitative. Variables answer questions such as "how many? Such as social security numbers and zip codes, take numerical values, but are not quantitative: They are qualitative. Variables usually does not make sense, even if the variables take numerical values. Categor...
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Information Storage and Retrieval: July 2013
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Enter your search terms. Information Storage and Retrieval. Wednesday, July 3, 2013. Asymptotic analysis of Algorithms. The complexity of an algorithm function is usually described as a function of the number of inputs it receives. Eg searching(linear search) a particular element in an array of n integers can be described as. F(n) = 4 2n. This method of removing all factors and of "keeping the largest growing term" as described above is what we call. In the limit of function f as. Big-Oh Notation: Its th...
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Information Storage and Retrieval: What is the difference between an Oracle User and an Oracle Schema?
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Enter your search terms. Information Storage and Retrieval. Sunday, January 19, 2014. What is the difference between an Oracle User and an Oracle Schema? An Oracle schema is a collection of database objects like tables, functions, indexes etc A user "owns" a schema. When a user is created, it is given access to a schema with same name. A user can be given access to objects of other schema. For all intents and purposes you can consider a user to be a schema and a schema to be a user. Cursor and Ref Cursor.
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Information Storage and Retrieval: June 2014
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Enter your search terms. Information Storage and Retrieval. Sunday, June 15, 2014. A way to design datawarehouse. It employs Ralph Kimball's bottom up approach to design data marts using conformed Facts and Dimensions. It contrasts with ER Modeling in its purpose. The purpose of ER modeling is to store the data in such a way that redundancy is minimized and inserts and updates are quick. Dimensional modeling on the other hand stores the data in such a way that querying or retrieval is fast. When there is...
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Information Storage and Retrieval: What is Oracle Wallet
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Enter your search terms. Information Storage and Retrieval. Friday, February 7, 2014. What is Oracle Wallet. There are often situations where we have to give database access credentials in a shell script. This can be a security issue as database connection details are explicitly written in these scripts. Oracle provides an option of creating an external password storage mechanism. Posted by Gaurav Kant Goel. Subscribe to: Post Comments (Atom). View my complete profile. Algorithms and Data Structures.
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Information Storage and Retrieval: May 2012
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Enter your search terms. Information Storage and Retrieval. Monday, May 28, 2012. Looping of Workflows in Informatica. Now you have to provide an Informatica solution wherein the the tables in target schema are loaded from corresponding tables in source schema dynamically. i.e there should be only 1 set of mappings for each loading and this set should be called 3 times(since there are 3 source schemas). Everytime the schema name should should dynamically change. Create a control table as follows:. Schema...
expertsql.blogspot.com
Expert en SQL: ORDER BY segons com ens convingui
http://expertsql.blogspot.com/2009/05/order-by-segons-com-ens-convingui.html
Dijous, 7 de maig de 2009. ORDER BY segons com ens convingui. Veiem com poder ordenar les dades segons com ens convingui i no només de forma ascendent (per defete) o descendent. Tenim per exemple la següent consulta:. SQL select distinct object type. 2 from user objects. 3 order by object type. I ara volem que els object type que comencin per la lletra P vagin en primer lloc, a continuació els que comencin per T, i finalment els altres ordenats per defecte ascendentment:. 2 from user objects.
expertsql.blogspot.com
Expert en SQL: Com trobar informació amb COLLECT
http://expertsql.blogspot.com/2009/05/how-to-find-something-with-collect.html
Divendres, 8 de maig de 2009. Com trobar informació amb COLLECT. Per poder trobar en quines taules es troba una columna concreta podem fer el següent:. SQL SELECT column name,. 2 COLLECT(table name) AS taula. 3 FROM user tab columns. 4 WHERE column name = 'FECENV'. 5 GROUP BY column name;. Publica un comentari a l'entrada. Subscriure's a: Comentaris del missatge (Atom). Format d’una variable DATE. La millora amb EXTRACT. PARTITION BY versus GROUP BY. Utilitats del CONNECT BY. René Nyffenegger on Oracle.
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Information Storage and Retrieval: November 2013
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Enter your search terms. Information Storage and Retrieval. Sunday, November 24, 2013. Snowflaking is a form of dimensional modeling in which a dimension is normalized. By moving attributes with low cardinality (few distinct values) into separate dimension tables that relate to the main dimension table by using foreign keys. Snowflakingcan be done in case of:. Sparsely populated attributes, where most dimension member records have a NULL value for the attribute, are moved to a sub-dimension. If your Orac...
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