![]() ![]() The WITH CHECK option clause specifies check level to be done in DML statements. It guarantees to return only one copy of each row from the base table. Select * from employee join salary using employee IDĮmployee tables join with the Salary tables with the Employee ID.Ī table is set to be key preserved table if every key of the table can also be the key of the result of the join. The USING clause is used to specify with the column to test for equality when two tables are joined. This is used as a place holder or represented it in as default entry to indicate that there is no actual data present.ġ5) What is USING Clause and give example? NULL value represents missing or unknown data. It is used to combine multiple operations. Merge statement is used to select rows from one or more data source for updating and insertion into a table or a view. Translate is used for character by character substitution and Replace is used substitute a single character with a word.ġ2) How do we display rows from the table without duplicates?ĭuplicate rows can be removed by using the keyword DISTINCT in the select statement.ġ3) What is the usage of Merge Statement? DML statements are insert, select, update and delete and it won’t implicitly commit the current transaction.ġ1) What is the difference between TRANSLATE and REPLACE? /*- */ is used to represent it as comments for block of statementĭata Manipulation Language (DML) is used to access and manipulate data in the existing objects.Two dashes(–) before beginning of the line – Single statement.Oracle Interview Questionsĩ) How do we represent comments in Oracle?Ĭomments in Oracle can be represented in two ways – Length should be specified in Bytes for BLOB. Coalesce(value1, value2,value3,…)Ī BLOB data type is a varying length binary string which is used to store two gigabytes memory. If all values in the list are null, then the coalesce function will return NULL. It also hold entire sub table.ĬOALESCE function is used to return the value which is set to be not null in the list. Nested table is a data type in Oracle which is used to support columns containing multi valued attributes. In Oracle, months_between function is used to find number of months between the given dates. Example is –ĥ) Whether any commands are used for Months calculation? If so, What are they? The NVL function is used to replace NULL values with another or given value. Manufacturing Production Interview Questions.Administrative Assistant Resume & Cover Letter.Business Intelligence :- More Interview Quetions.Oracle Warehouse Builder Interview Questions.DATA ANALYTICS :- More Interview Questions.Computer System Analyst (Software) Interview Questions.Equity Trading & Dealer Interview Questions.Performance Testing Interview Questions.PROGRAMMING : – More Interview Questions.Microsoft OFFICE :- More Interview Questions.Microsoft PowerPoint Interview Questions.ADO.NET Entity Framework Interview Questions.Oracle Applications Interview Questions. ![]()
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