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what is the difference between these two sql statements
a) select * from T1,T2 where T1.A=T2.A ;
b) select * from T1,T2 where T2.A=T1.A ;
I am getting the same output in both cases,is there any differences between both statements?
c) select * from T1 inner join T2 on T1.A=T2.A ;
What is the diffence between Statement C and a?in that case also getting the same output as of a and b…
Can Inner Joins also be written as sql statement a?
They are all essentially different ways to join two tables using the same join condition.
Between 1 and 2, there is absolutely no difference as far as the database is concerned.
The last option is the standardized join syntax – this is what you should be using in order to ensure your SQL is readable – this is what people reading your SQL will expect to see when you join tables.