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Oracle SQL Interview Questions Series - 1 Oracle SQL Interview Questions covered in Eduflee, so complete all the series to get placed into the IT company. At present Structured Query Language is very important to enter into the Software company. After completing all the Interview series, you can crack many interviews with 100% assurance from my experience. Basic Questions for SQL interview Schema => User Records => Rows Fields => Columns Result set => Output 1, What are the Schema Objects in Oracle SQL ?     Table, View, Materialized view, Sequence, Synonyms, Index are the schema objects in SQL.     Table => Basic Unit of Storage [Rows and Columns]     View => Logical Representation of subject of records, It does not contains any data. So here data is logical.     Materialized View =>   It contains the data, it is also called as Snapshot. It contains data physically.     Sequence => It is a Numeric Value Generator     Synonyms => used to provide alternate nam

Regular Expression in Oracle SQL Regular Expression in Oracle SQL is a pattern matching technique to retrieve sort of data based on the conditions given in Oracle database. Pattern Matching is similar to functions like, replace, substring and in string which are previously seen topics. At the end of this article there will be certain task to practice for this Regular Expressions. It is very important to be very clear about this topic, this are very helpful for many interview Questions. Using regular expressions with Oracle Database: Overview Regular Expression is one of the easiest way to learn with clear understanding if one are familiar with the below Basic string matching patterns, Quantifiers, Meta characters, Functions etc. Note : The above points should understand clearly means it will be very easy to write a query. Basic String Matching with Regular Expressions | Either or  () Group \ Escape ^ Start $ Stop Literals of regular expression in oracle sql [ a b c ] a, b, c [^ a

Introduction to Create a Sequence in Oracle As we discussed the schema objects in the previous session, so in this session that we are going to see one of the schema objects. This is very important topic that most of the interview questions are comes from here. At the end of this session, you will be very clear about the below topics related to the sequence: What is Sequence in Oracle ? Importance of creating sequence in Oracle Syntax for creating sequence in Oracle Data Dictionary for sequences. How to reset the sequence in Oracle ? How to alter the sequence in Oracle ? How to drop the sequence in Oracle ? NOTE : Answer the Interview Questions at the end of the article What is Sequence in Oracle ? Sequence is a numeric value generator which is used to generate the numbers in a sequential order by the incremental order. It is mostly used to generate the primary key value. Importance of creating sequence in Oracle It is a schema Objects and it is also a sharable objects Can able to crea