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UNION combines and removes duplicates, UNION ALL combines without removing duplicates
UNION merges the result sets of two or more SELECT statements and removes duplicates
UNION ALL merges the result sets of two or more SELECT statements without removing duplicates
UNION is slower than UNION ALL as it involves removing duplicates
Example: SELECT column1 FROM table1 UNION SELECT column1 FROM table2;
Example: SELECT column1 FR
HAVING is used with GROUP BY to filter grouped rows, WHERE is used to filter individual rows. WHERE cannot be replaced with HAVING.
WHERE is used to filter individual rows before grouping, HAVING is used to filter grouped rows after grouping
HAVING is used in conjunction with GROUP BY clause, WHERE is used independently
WHERE filters rows based on conditions, HAVING filters groups based on conditions
Example: SELECT depart...
The number of balloons that can fill an airplane depends on the size of the airplane and the size of the balloons.
The size of the airplane (e.g. small private plane vs. commercial airliner) will greatly impact the number of balloons that can fit.
The size of the balloons (e.g. standard party balloons vs. large weather balloons) will also affect the total number that can be accommodated.
Consider the available space insid...
I applied via LinkedIn and was interviewed in Dec 2023. There were 2 interview rounds.
The difference between WHERE and HAVING clauses in SQL.
WHERE clause is used to filter rows based on a condition before the data is grouped or aggregated.
HAVING clause is used to filter groups based on a condition after the data is grouped or aggregated.
WHERE clause is used with SELECT, UPDATE, DELETE statements, while HAVING clause is used with SELECT statements that include GROUP BY clause.
WHERE clause filters individ...
I applied via LinkedIn and was interviewed in Jan 2024. There was 1 interview round.
The position is for SBA but they expect you to be as good as developer in coding. They want someone as good as developer but they don't call him/her as developer and give the designation as BA which I did not like. No questions regarding BA or PM or any Agile or waterfall methodologies 3 rounds every thing about coding (SQL, Python, ) and tools like Alteryx, AWS glue
Happen to meet changes
Saras Analytics interview questions for popular designations
I applied via Referral and was interviewed before Oct 2023. There were 2 interview rounds.
Decision tree criteria
Assumptions of linear regression include linearity, independence, homoscedasticity, and normality.
Linearity: The relationship between the independent and dependent variables is linear.
Independence: The residuals are independent of each other.
Homoscedasticity: The variance of the residuals is constant across all levels of the independent variables.
Normality: The residuals are normally distributed.
I was interviewed before Jul 2022.
Test is simple. Make sure You make atleast 70% correct answers
I applied via AngelList and was interviewed in Feb 2022. There were 3 interview rounds.
There were two parts ,One is theoretical and another one is practical.
In theoretical round questions on SQL and ETL tools (MCQs).
In practical round, mystery puzzle was given, in which we have to solve the puzzle using SQL ( Different tables were given and few conditions were given)
HAVING clause is used with GROUP BY to filter the results based on aggregate functions, while WHERE clause is used to filter individual rows.
HAVING clause is used after GROUP BY clause.
HAVING clause is used to filter the results based on aggregate functions like SUM, COUNT, AVG, etc.
WHERE clause is used before GROUP BY clause.
WHERE clause is used to filter individual rows based on conditions.
HAVING clause cannot be use...
LOD stands for Level of Detail. It is a technique used in Tableau to perform complex calculations on aggregated data.
LOD expressions allow users to compute values at different levels of detail in a visualization
They can be used to create custom aggregations, filters, and calculations
There are three types of LOD expressions: FIXED, INCLUDE, and EXCLUDE
FIXED LOD expressions define a level of detail that is independent of...
Rank function assigns unique rank to each distinct row, while Dense rank function assigns same rank to rows with same values.
Rank function is used to assign a unique rank to each distinct row based on the order specified in the ORDER BY clause.
Dense rank function is used to assign the same rank to rows with the same values, skipping the next rank if there are ties.
Rank function returns consecutive ranks, while dense ra...
2 questions on Aptitude test asked by Hiring manager and 1 SQL question
I applied via Campus Placement and was interviewed before Apr 2023. There were 2 interview rounds.
I applied via AngelList and was interviewed before Feb 2023. There were 2 interview rounds.
SQL test comprises of Warehouse Theoretical question and one SQL Murder Mystery Practical question.
I applied via Instahyre and was interviewed in Mar 2022. There were 3 interview rounds.
Good problem solving skills. Good knowledge of angular and JavaScript.
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