TRIM(SUBSTRING(customer_name, 1, INSTR(customer_name, ',') - 1)) AS last_name, TRIM(SUBSTRING(customer_name, INSTR(customer_name, ',') + 1, INSTR(customer_name ...
Partition is one of the window functions used to aggregate values over a group of columns without aggregating those rows into a sigle row value. We will use the partition function to find the row with ...
Learn how to master the SELECT statement to form truly useful data queries. This article explains functions, clauses, and keywords that will make your life a lot easier. Due to popular demand, we’re ...
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