Nth Highest Salary in MySQL - Interview Questions

Описание: #mysqlInterviewQuestions #mysqlInterviewQuestionsAndAnswers #mysql
Find out nth highest salary in MySQL. It is very easy and asking in every interview. I am using SmartMySQL Workbench it is free and you can download from
https://smartmysql.com/pages/downloads

Make your MySQL Development 10X faster, Speed Up your slow queries and gain over 100X performance with optimal indexes, Solve MySQL real Production issues with the debugger and Many more Amazing Features for MySQL Developer and DBA Needs.

For Developers
The SmartMySQL allows developers and DBAs speedup SQL development time up to 9x and fine-tune slow queries with optimal indexes and speed up more then 10x before going to live. It simplifies all DB activities and not needed expert level DB engineer knowledge to debug syntax errors with a significantly high success rate compared to human work . Increased application performance, which can directly drive increased revenue or cost reductions.
9X Faster SQL Development
SmartMySQL Advance Query browser constructs queries with easy drag and drops options. Developers/Programmers can write SQL & PL/SQL around 90% quicker compared to other GUI tools
Query Optimizer: Speed Up Slow Queries More Than 10X with Optimal Indexes
Performance of SQL queries plays a big role in application performance. If some queries execute slowly, these queries or the database schema may need tuning.
Smart Query Optimizer recommends best indexes for slow queries and speeds up more than 10X faster. Many customers are using and gained over 100X Query performance improvement.
Identifies and Highlight Syntax Errors
The SmartMySQL points out syntax error as an error icon in the tool and highlighted the specific location of the error in the query with the red background colour. It is very easy to check and correct them. Further, during such instances, the SmartMySQL shows Google, Yahoo and Bing search engines links along with MySQL Error message
Smart-Auto Complete
Recognizes user's preferred shortcut names for query snippets (favourite queries), historical queries & frequently executed queries and syncs them with autocomplete list. SmartMySQL embedded many useful queres into Auto-Complete.
SQL Beautifier (SQL Formatter)

Beautify SQL statements instantly and convert code into well-formatted SQL script for easy understandable
PL/SQL Code Generator
This new feature can create SP using the cursor Query Query. Just need to add your logic for every row. It saves PL/SQL development time
It is also simplified to create SP, Triggers, Functions, Events, and Views with SmartMySQL Query Browser.

Lock-Free Execution Option
SmartMySQL provides five types of execution options
Lock-Free Execution
Bulk Query Execution
Bulk Write Execution
Query Execution
Query Execution with Edit
Visual Explain
SmartMySQL provides all of the EXPLAIN formats for executed queries including the raw extended JSON, traditional format, and visual query plan

For DBA
The SmartMySQL allows developers and DBAs in order to quickly improve the overall performance of the database applications by monitoring query performance and debug live production issues. Enhanced instrumentation, which makes it easier for your to understand and tune your business-critical workloads for peak performance. It simplifies and not needed expert level DB engineer knowledge to find and fix production issues with a significantly high success rate compared to human work.
Production MySQL Issues Debugger
The SmartMySQL Debugger is the first tool which can identify production issues on live DB which are casuing slowdown server or server slowdown and provide quick solutions and helps to void DB outtage and improve DB uptime.
Quickly identify expensive queries that impact the live DB performance of their applications
Find out Deadlocks and cope with deadlocks and reduce the probability of their occurrence with the technique to add well-chosen indexes to tables
Filter for long-running uncommitted Transaction that impacts other transactions.
Query Locks that impacts other Queries
Integrated Query Optimizer helps to fine-tune expensive queries on the dashboard with best indexes and query rewrite recommendations.
Filter for specific query problems like full table scans and bad indexes using advanced global search options
Filter Replication issues which are causing replication lagging.
Fix the root causes of poor performance directly in the SQL code
Index Tuning Get alerts when your index usage needs improvement, followed by advice on how to improve it.
MySQL Slow Query Log File Analyser
The MySQL slow query log contains information about queries that take a long time to execute (see “The Slow Query Log”).