LEAD & LAG in SQL | Analytical Functions Advanced SQL | Ashutosh Kumar 

Sql one of the most important language asked in most of the analytics interviews,in this series i have discussed some advanced level sql concepts that are frequently asked in data analyst,business analyst interviews. In this video i have covered lead lag functions concepts in sql which comes in window functions.
👉 Link to excel file -
github.com/ashutoshkr103/Micr...
#code for 1st table
drop table if exists details;
CREATE TABLE details(train_no INT, station VARCHAR(200), Timing TIME);
INSERT INTO details(train_no , station , Timing)
VALUES(22863,'Howrah','10:50:00'),
(22863 ,'Kharagpur','12:30:00'),
(22863 ,'Balasore','13:52:00'),
(22863 ,'Cuttack','15:47:00'),
(22863 ,'Bhubaneswar','16:25:00'),
(12262 ,'Howrah','05:45:00'),
(12262 ,'Tatanagar','09:00:00'),
(12262 ,'Bilaspur','15:05:00'),
(12262 ,'Raipur','16:37:00'),
(12262 ,'Nagpur','20:55:00');
select * from details;
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