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The IN operator may be used if you know the exact value you want to return for at least one of the columns.
PL/SQL Interview Questions and Answers
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The IN operator may be used if you know the exact value you want to return for at least one of the columns.
SELECT column_name FROM table_name WHERE column_name IN (value1,value2,..)
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Other Interview Questions
- What's SQL
- What's SQL*Plus
- What's NVL
- What's Date Functions
- What's Character Functions
- What's TTITLE & BTITLE
- What's COLUMN
- What's BREAK
- What's COMPUTE
- What's SET
- What's SPOOL
- What's JOIN
- What's Union
- What's Intersect
- What's Minus
- What's Correlated Subquery
- What's Multiple columns
- What's Sequences
- What's Synonyms
- What's Indexes
- What's Data types
- Order of SQL statement execution
- What's Transaction
- What's Commit
- What's Posting
- What's Rollback
- What's Savepoint
- Set Transaction
- What's Locking
- What's Consistency
- What's Integrity
- What's Deadlock
- What's Mutating Table
- What's SQL*Loader
- The most important DDL statements in SQL are:
- Operators used in SELECT statements.
- SELECT statements:
- The SELECT INTO Statement is most often used to create backup copies of tables or for archiving records.
- The INSERT INTO Statements:
- The Update Statement:
- The Delete Statements:
- Sort the Rows:
- The IN operator may be used if you know the exact value you want to return for at least one of the columns.
- BETWEEN ... AND
- What is the use of CASCADE CONSTRAINTS?
- Why does the following command give a compilation error?
- Which system tables contain information on privileges granted and privileges obtained?
- Which system table contains information on constraints on all the tables created?obtained?
- What is the difference between TRUNCATE and DELETE commands?
- State true or false. !=, <>, ^= all denote the same operation?
- State true or false. EXISTS, SOME, ANY are operators in SQL?
- What will be the output of the following query?
- What does the following query do?
- What is the advantage of specifying WITH GRANT OPTION in the GRANT command?
- Which command executes the contents of a specified file?
- What is the value of comm and sal after executing the following query if the initial value of ‘sal’ is 10000 UPDATE EMP SET SAL = SAL + 1000, COMM = SAL*0.1;?
- Which command displays the SQL command in the SQL buffer, and then executes it?
- What command is used to get back the privileges offered by the GRANT command?
- What will be the output of the following query?
- Which date function is used to find the difference between two dates?
- What operator performs pattern matching?
- What is the use of the DROP option in the ALTER TABLE command?
- What operator tests column for the absence of data?
- What are the privileges that can be granted on a table by a user to others?
- Which function is used to find the largest integer less than or equal to a specific value?
- Which is the subset of SQL commands used to manipulate Oracle Database structures, including tables?
- What is the use of DESC in SQL?
- What command is used to create a table by copying the structure of another table?
- TRUNCATE TABLE EMP; DELETE FROM EMP; Will the outputs of the above two commands differ?
- What is the output of the following query SELECT TRUNC(1234.5678,-2) FROM DUAL;?
- What are the wildcards used for pattern matching.?
- What is the parameter substitution symbol used with INSERT INTO command?
- What's an SQL injection?
- What is difference between TRUNCATE & DELETE
- What is a join? Explain the different types of joins?
- What is the sub-query?
- What is correlated sub-query?
- Explain CONNECT BY PRIOR?
- Difference between SUBSTR and INSTR?
- Explain UNION, MINUS, UNION ALL and INTERSECT?
- What is ROWID?
- What is the fastest way of accessing a row in a table?
- What is an integrity constraint?
- What is referential integrity constraint?
- What is the usage of SAVEPOINTS?
- What is ON DELETE CASCADE?
- What are the data types allowed in a table?
- What is difference between CHAR and VARCHAR2? What is the maximum SIZE allowed for each type?
- How many LONG columns are allowed in a table? Is it possible to use LONG columns in WHERE clause or ORDER BY?
- What are the pre-requisites to modify datatype of a column and to add a column with NOT NULL constraint?
- Where the integrity constraints are stored in data dictionary?
- How will you activate/deactivate integrity constraints?
- If unique key constraint on DATE column is created, will it validate the rows that are inserted with SYSDATE?
- What is a database link?
- How to access the current value and next value from a sequence? Is it possible to access the current value in a session before accessing next value?
- What is CYCLE/NO CYCLE in a Sequence?
- What are the advantages of VIEW?
- Can a view be updated/inserted/deleted? If Yes - under what conditions?
- If a view on a single base table is manipulated will the changes be reflected on the base table?
- Which of the following statements is true about implicit cursors?
- Which of the following is not a feature of a cursor FOR loop?
- How would the developer define this variable using referential datatypes?
- Which three of the following are implicit cursor attributes?
- If left out, which of the following would cause an infinite loop to occur in a simple loop?
- Which line in the following statement will produce an error?
- The command used to open a CURSOR FOR loop is
- What happens when rows are found using a FETCH statement
- Read the following code:
- Read the following code:
- What is the maximum number of handlers processed before the PL/SQL block is exited when an exception occurs?
- 77. For which trigger timing can you reference the NEW and OLD qualifiers?
- Read the following code 2:
- When invoking this procedure, you encounter the error
- Read the following code 3
- Which procedure can be used to create a customized error message?
- The CHECK_THEATER trigger of the THEATER table has been disabled. Which command can you issue to enable this trigger?
- Examine this database trigger
- Examine this function:
- Under which circumstance must you recompile the package body after recompiling the package specification?
- Procedure and Functions are explicitly executed. This is different from a database trigger. When is a database trigger executed?
- Which Oracle supplied package can you use to output values and messages from database triggers, stored procedures and functions within SQL*Plus?
- What occurs if a procedure or function terminates with failure without being handled?
- Examine this code
- Which Oracle supplied package will enable this feature?
- Which Oracle supplied package will enable this feature?
- How to implement ISNUMERIC function in SQL *Plus ?
- How to Select last N records from a Table?
- What is the difference between Truncate and Delete interms of Referential Integrity?
- CLIENT/SERVER
- What does the OLTP stands for ?
- What is the most important requirement for OLTP ?
- In a client server environment, what would be the major work that the client deals with ?
- Why is the most of the processing done at the sever ?
- What does teh term upsizing refer to ?
- What does one do when one is rightsizing ?
- What does the term downsizing refer to ?
- What is event trigger ?
- Why do stored procedures reduce network traffic ?
- What are the types of processes that a server runs ?
- What is a event handler ?
- What is an integrity constraint ?
- What are the various uses of database triggers ?
- What is a transaction ?
- Why are the integrity constraints preferred to database triggers ?
- Why is it better to use an integrity constraint to validate data in a table than to use a stored procedure ?
- What are the three components of a client server model ?
- What are the advantages of client/server model ?
- What are the disadvantages of the client/server model ?
- What are the different topologies available for network ?
- What is the first work of Client process ?
- What are the responsibilities of a Server ?
- In a Client/Server context, what does API (Application Programming Interface) refer to ?
- Give some examples of standard API??s ?
- What is the main advantage of developing an application using an API ?
- What is the main disadvantage of developing an application using an API ?
- Why is an event driven program referred to a passive program ?
- What are the four types of events ?
- What is the difference between file server and a database server ?
- What is inheritance ?
- What are the two components of ODBC ?
- What is the function of a ODBC manager ?
- What is the function of a ODBC Driver ?
- What description of a data source is required for ODBC ?
- How is a connection establised by ODBC ?
- PL/SQL Questions:
- SQL/ SQLPlus
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