Oracle SQL PLSQLDATENAME Function Examples. This DATENAME function returns a character string that represents a part of a given date and time value. Lets see some of the examples of DATENAME function. DATENAME Example 1. Below queries find todays day. Result of both the queries is same SELECT DATENAMEdw, getdate AS Today IsSELECT DATENAMEweekday, getdate AS Today IsResult Today Is. Monday. DATENAME Example 2. Below queries find current week. Result of all the 3 queries is same SELECT DATENAMEweek, getdate AS This is weekSELECT DATENAMEwk, getdate AS This is weekSELECT DATENAMEww, getdate AS This is weekResult This is week. DATENAME Example 3. SQL, SQL Server, Tutorials, Oracle, PLSQL, Interview Questions Answers, Joins, Multiple Choice Questions, Quiz, Stored Procedures, Select, Insert, Update, Delete. A relational database management system uses SQL MERGE also called upsert statements to INSERT new records or UPDATE existing records depending on whether condition. SQL Server 2008 introduced the MERGE statement, which promised to be a simpler way to combine insertupdatedelete statements, such as those used during ETL extract. Java2s. com Emailinfo at java2s. com Demo Source and Support. All rights reserved. Below queries find current month. Result of all the 3 queries is same SELECT DATENAMEmonth, getdate AS This is monthSELECT DATENAMEmm, getdate AS This is monthSELECT DATENAMEm, getdate AS This is monthResult This is month. July. DATENAME Example 4. Below queries find current quarter. Result of all the 3 queries is same SELECT DATENAMEquarter, getdate AS This is quarterSELECT DATENAMEq, getdate AS This is quarterSELECT DATENAMEqq, getdate AS This is quarterResult This is quarter. DATENAME Example 5. Below queries find current year. Result of all the 3 queries is same SELECT DATENAMEyear, getdate AS This is yearSELECT DATENAMEyyyy, getdate AS This is yearSELECT DATENAMEyy, getdate AS This is yearResult This is year. DATENAME Example 6. Below query finds current timezone. Select DATENAMEtz,SYSDATETIMEOFFSETResult No column name0. Oracle SQL Tutorial. Free Oracle SQL Tutorial. Oracle SQL Tutorial Contents. Introduction to Databases. CODDS Rules Datatypes and Creating Tables. Oracle SQL SELECT Statement. Formatting Output in SQL Plus. UNION, INTERSECT, MINUS Operators and Sorting Query Result. Oracle SQL Functions. Number. Functions Math FunctionsCharacter Functions. Miscellaneous Functions. Aggregate Functions. Date and Time Functions. Oracle Join Queries, Inner Join, Outer Join, Self JoinGROUP BY Queries, SUB Queries CUBE, ROLLUP Functions, WITH, CASE Operators. Oracle Data Manipulation Language INSERT, UPDATE, DELETE, INSERT ALL, MERGEOracle Data Definiation Language CREATE, ALTER, DROP, TRUNCATE, RENAMEOracle Transaction Control Language COMMIT, ROLLBACK,SAVEPOINTData Control Language GRANT, REVOKE. Oracle Integrity Constraints PRIMARY KEY, NOT NULL, CHECK, FOREIGN KEY, UNIQUEDEFAULT Values. Dropping Constraints. Disabling and Enabling Constraints. Deffering Constraints Check. Viewing Information about Constraints. Oracle Date Operators, Functions. Managing Oracle Views Managing Oracle Sequences. Managing Oracle Synonyms. Managing Indexes and Clusters. Oracle Table Partitioning and Creating Partitioned Tables. Altering Partition. Dropping Partitions. Merging Partitions. Splitting Partitions. Coalescing Partitions. Oracle Objects and Object Types. DATABASEA database is a collection of Data Information. Examples of. Attendance Register. Telephone Directory, Muster Rule. Database Management SystemDBMS A database management system is a. That is, it acts as a. RDBMS A Database Management System based on Relational Data Model is known as. Relational Database Management System RDBMS. Relational Data Model was developed by Dr. E. F. CODD. He developed the. Relational Algebra in. June 1. 97. 0. Relational Data Model has some 1. Rules which are named after Codd as. Codd Rules. According to Codd a package can be called as RDBMS only if it. Codd Rules. ORACLE Oracle is an Object Relational Database Management System. It is the leading. RDBMS vendor worldwide. Nearly half of RDBMS worldwide market is owned by. Oracle. ORACLE DATABASE Every Oracle Database Contains Logical and Physical Structures. Logical. Structures are tablespaces, Schema objects, extents and segments. Physical. Structures are Datafiles, Redo Log Files, Control File. A database is divided into logical storage units called tablespaces, which. Each Tablespace in turn consists of. In relational database system all the information is stored in form. A table consists of rows and columns All the tables and other objects in Oracle are stored in tablespace logically, but. Every Oracle database has a set of two or more redo log files. The set of. redo log files for a database is collectively known as the databases redo log. A redo log is made up of redo entries also called redo records. The primary function of the redo log is to record all changes made to data. If a failure prevents modified data from being permanently written to the. Every Oracle database has a control file. A control file contains the. Every Oracle database also has a Parameter File. Parameter file contains the. Database, Memory Settings and Location of Control file.
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