Is there a way I can improve this kind of SQL query performance: INSERT INTO … WHERE NOT EXISTS(Validation…) The problem is when I have many data in my table (like million of rows), the …
Tag: performance
Equals(=) vs. LIKE
When using SQL, are there any benefits of using = in a WHERE clause instead of LIKE? Without any special operators, LIKE and = are the same, right? Answer Different Operators LIKE and = are different operators. Most answers here focus on the wildcard support, which is not the only difference between these operators! = is a comparison operator that
Is there efficient SQL to query a portion of a large table
The typical way of selecting data is: select * from my_table But what if the table contains 10 million records and you only want records 300,010 to 300,020 Is there a way to create a SQL statement …
Is a view faster than a simple query?
Is a faster than the query itself to create the view (in order to have the same resultSet): ? It’s not totally clear to me if the view uses some sort of caching making it faster compared to a simple query. Answer Yes, views can have a clustered index assigned and, when they do, they’ll store temporary results that can