Top 50 SQL Interview Questions and Answers in 2021 | Oracle SQL Quiz with answers

[@NICITACADEMY]

*Complete 48 hours of Self-Paced Courses and Interview Questions Links:* courses.nicitacademy.com/ Are you interested in joining my Live training? or Self-Paced course? You can visit our website for more details. www.nicitacademy.com/ Contact me for more details @ 🌕 wa.link/m4lat0 *WhatsApp group:* chat.whatsapp.com/KMN5pKoLGSu8PuFLxSouB0 Thanks, NiC IT Academy ======================================================================= 🔵Oracle SQL Tutorial - English kzbin.info/aero/PLsphD3EpR7F9mmtY2jBt_O8Q9XmvrhQEF 📌*IICS demo session:* kzbin.info/www/bejne/eWLdeImIe7JmY6M 📌*Informatica Full Course:* kzbin.info/www/bejne/jGOppY2VfrOgoMk 📌*SQL Full Course:* kzbin.info/www/bejne/n6bZq52cbNOIZ6s 📌*Informatica, IICS, and SQL playlist* 🌕 IICS Tutorial ENGLISH - Playlist kzbin.info/aero/PLsphD3EpR7F9sqnL3R0jeETHP08Touklj 🌕 Informatica training in ENGLISH - Playlist kzbin.info/aero/PLsphD3EpR7F9HtxQHfoRAStSWAuF7zBfd 🌕 Informatica Interview Preparation - ENGLISH kzbin.info/aero/PLsphD3EpR7F-z_PFoL-uFc9_4DEnYsR3d 🌕Oracle SQL - தமிழில் kzbin.info/aero/PLsphD3EpR7F-u4Jjp_3fYgLSsKwPPTEH4 🔵 Informatica training in தமிழில் - Playlist kzbin.info/aero/PLsphD3EpR7F8dOIX6bhpv3fnZ8Io_WrH3 🔵 Informatica Interview Preparation - TAMIL kzbin.info/aero/PLsphD3EpR7F8MoCdaGFY_xO7mMfT3fvnD 🔵Unix for Informatica Developer kzbin.info/aero/PLsphD3EpR7F8jeo31oVNJ0yG9AaD-5_jw 🌕Informatica Project videos kzbin.info/aero/PLsphD3EpR7F98r1Mp4QGT9iYmTNwyzPa6 Please subscribe, Like, and comment. I will post more videos. Thanks

[@krishnanselvam786]

31) How would you reference column values BEFORE and AFTER you have inserted and deleted triggers? 32) What are the uses of SYSDATE and USER keywords? 33) How does ROWID help in running a query faster? 34) What are database links used for? 35) What does fetching a cursor do? 36) What does closing a cursor do? 37) Explain the uses of Control File. 38) Explain Consistency 39) Differ between Anonymous blocks and sub-programs 40) Differ between DECODE and CASE.

[@krishnanselvam786]

1) What is PL SQL ? 2) Differentiate between % ROWTYPE and TYPE RECORD. 3) Explain uses of cursor.? 4) Show code of a cursor for loop 5) Explain the uses of database trigger. 6) What are the two types of exceptions. 7) Show some predefined exceptions. 8) Explain Raise_application_error. 9) Show how functions and procedures are called in a PL SQL block. 10) Explain two virtual tables available at the time of database trigger execution.

[@NICITACADEMY]

I highly appreciate on your effort and continuous feedback. I will post answers for these questions soon.

[@krishnanselvam786]

21) Show the two PL/SQL cursor exceptions. 22) What operators deal with NULL? 23) Does SQL*Plus also have a PL/SQL Engine? 24) What packages are available to PL SQL developers? 25) Explain 3 basic parts of a trigger. 26) What are character functions? 27) Explain TTITLE and BTITLE. 28) Show the cursor attributes of PL/SQL. 29) What is an Intersect? 30) What are sequences?

[@NICITACADEMY]

I highly appreciate on your effort and continuous feedback. I will post answers for these questions soon.

[@krishnanselvam786]

41) Explain autonomous transaction. 42) Differentiate between SGA and PGA. 43) What is the location of Pre_defined_functions. 44) Explain polymorphism in PL SQL. 45) What are the uses of MERGE? 46) Can 2 queries be executed simultaneously in a Distributed Database System? 47) Explain Raise_application_error. 48) What is out parameter used for eventhough return statement can also be used in pl/sql? 49) How would you convert date into Julian date format? 50) Explain SPOOL?

[@NICITACADEMY]

I highly appreciate on your effort and continuous feedback. I will post answers for these questions soon.

[@shahir-vf4tm]

4 th question answer B,D both are the same.

[@krishnanselvam786]

51) Mention what PL/SQL package consists of? 52) Mention what are the benefits of PL/SQL packages? 53) Mention what are different methods to trace the PL/SQL code? 54) Mention what does the hierarchical profiler does? 55) Mention what does PLV msg allows you to do? 56) Mention what is the PLV (PL/Vision) package offers? 57) Mention what is the use of PLVprs and PLVprsps? 58) Explain how you can copy a file to file content and file to PL/SQL table in advance PL/SQL? 59) Explain how exception handling is done in advance PL/SQL? 60) Mention what problem one might face while writing log information to a data-base table in PL/SQL?

[@krishnanselvam786]

please post videos ...................sir......... 61) Mention what is the function that is used to transfer a PL/SQL table log to a database table? 62) When you have to use a default “rollback to” savepoint of PLVlog? 63) Why PLVtab is considered as the easiest way to access the PL/SQL table? 64) Mention what does PLVtab enables you to do when you showthe contents of PL/SQL tables? 65) Explain how can you save or place your msg in a table? 66) Mention what is the use of function “module procedure” in PL/SQL? 67) Mention what PLVcmt and PLVrb does in PL/SQL?

[@krishnanselvam786]

What is cursor? Type of current Cursor attributes Cursor for loop Refer cursor What is difference between for loop and cursor for loop and ref cursor? With Syntex please explain and post video sir.

[@krishnanselvam786]

What is plsql collections ? Varray Nested table Index by table or associative array What is difference between With details explanation please post video sir.

[@krishnanselvam786]

Please post analytical functions with details explanation with interview questions.

[@krishnanselvam786]

11) What are the rules to be applied to NULLs whilst doing comparisons? 12) How is a process of PL SQL compiled? 13) Differentiate between Syntax and runtime errors. 14) Explain Commit, Rollback and Savepoint. 15) Define Implicit and Explicit Cursors. 16) Explain mutating table error. 17) When is a declare statement required? 18) How many triggers can be applied to a table? 19) What is the importance of SQLCODE and SQLERRM? 20) If a cursor is open, how can we find in a PL SQL Block?

[@NICITACADEMY]

I highly appreciate on your effort and continuous feedback. I will post answers for these questions soon.

[@krishnanselvam786]

Could you tell me sir in which time will choose rank and dense rank please explain sir.

[@krishnanselvam786]

What is global temporary table please upload videos with details explanation sir.

[@krishnanselvam786]

Please post video sir Analytical functions: --------+++++++---------- Rank Dense_rank Lead Lag Row_number Listagg Pivot Unpivot Roll-up Cube With interview questions and details explaination sir.

[@NICITACADEMY]

Hi Krishnan, Thanks for your feedback, I will post soon.

[@krishnanselvam786]

When I am checking in playlist I have seen some plsql session vides 1 to 6 session in this session missing 4 and 5 session sir.if have 4 and 5 session video please upload sir.....

[@krishnanselvam786]

What is pragma autonomous translation with details explanation and interview questions.?please post video sir.

[@visalir3468]

Please upload informatica / ETL too. Thanks 🙏 sir

[@NICITACADEMY]

Already uploaded 60 videos, 40 videos in Tamil and 20 videos in English. Please check the playlist

[@krishnanselvam786]

Please post video what is pragma autonomous translation with details explanation please post video sir. This is also interview questions sir.

[@krishnanselvam786]

What is table partitioning please upload videos with details explanation

[@krishnanselvam786]

Pleast post video correlate subquery and merge topics with interview questions.

[@krishnanselvam786]

Could you post video sir... How to use collection methods? Limit Count First Last Trim(n) Delete Extennd(n) Prior(n) Next(n).....pls upload this viideo sir.

[@NICITACADEMY]

Yes, sure

[@krishnanselvam786]

@@NICITACADEMY thank you sir

[@krishnanselvam786]

Sir please upload PLSQL interview questions and answers with details explaination alest 50 questions and answers.........sir........thank you so so much sir. For your SQL questions and answer videos........🙏🙏🙏🙏

[@NICITACADEMY]

As soon as possible

[@krishnanselvam786]

PLEASE POST THESE ARE ALL TOPIC SIR......THIS IS INTERVIEW QUESTION SIR.... Pivot Unpivot Roll-up Cube

[@NICITACADEMY]

Okay sure, Noted, I post video

[@krishnanselvam786]

Which operator is used in query for pattern matching?

[@krishnanselvam786]

Plsql DBMS _ jobs videos please upload videos with details explanation sir.

[@krishnanselvam786]

UTL_FILE and XML please video with details explanation sir.

[@krishnanselvam786]

What is SQL loader and external table and what is difference between SQL loader and external table with details explanation please post video...thank you sir...

[@NICITACADEMY]

Noted

[@krishnanselvam786]

What is index and index organized table with details explanation please post video sir

[@NICITACADEMY]

Will do soon

[@krishnanselvam786]

Advantages and disadvantage s of stored procedure

[@krishnanselvam786]

What is local procedure?

[@krishnanselvam786]

What is The difference between cluster and non cluster index

[@krishnanselvam786]

What is difference between RANK and DENSE_RANK AS aggregate & Analytical function? You have already post rank video in playlist but voice was breaking often sir please reupload that video and also plase add diff between aggregate & Analytical function.

[@NICITACADEMY]

Sure, I will check.

[@krishnanselvam786]

what is ACID ? SIR

[@krishnanselvam786]

Please post video sir.mutating table error?

[@NICITACADEMY]

As soon as possible

[@krishnanselvam786]

What is online transaction processing OLTP

[@NICITACADEMY]

Hi, I have uploaded the video on this topic already, Please check the playlist.

[@SATHISHSATHISH-mt8cb]

Sir could u please upload a balance topics functions, triggers, cursor, packages

[@NICITACADEMY]

Sure, Keep watching.

[@kaviyarasus9344]

@@NICITACADEMY still we are watching

[@krishnanselvam786]

What is local variable and bind variable?

[@krishnanselvam786]

What is denormalization

[@NICITACADEMY]

Hi, I have uploaded the video on this topic already, Please check the playlist. Data warehouse topic.

[@krishnanselvam786]

What are aggregate and scalar functions

[@NICITACADEMY]

Hi, I have uploaded the video on this topic already, Please check the playlist.

[@krishnanselvam786]

What is normalization

[@NICITACADEMY]

Hi, I have uploaded the video on this topic already, Please check the playlist. Data warehouse topic.

[@krishnanselvam786]

What is data warehouse

[@NICITACADEMY]

Hi, I have uploaded the video on this topic already, Please check the playlist.

[@krishnanselvam786]

@@NICITACADEMY could you please attach the link below sir.i can't find in playlist where it is?

[@sumimadhan20]

Say a procedure is failed and insert operations performed are rolled back.Can we store the data in a table with all the data that are rolled back?Hw do we do that?.Expecting you answer on this Sir.Thanks in advance.

[@NICITACADEMY]

We can handle it exception handling. Keep watching my channel. I will post videos.

[@sumimadhan20]

@@NICITACADEMY thanks Sir

[@krishnanselvam786]

What is the cluster and non cluster table?

[@krishnanselvam786]

What is data integrity