Given the table definition: create table mytable ( id integer, mydate datetime, myvalue integer ) I want to get the following answer by a single SQL query:
In PostgreSQL: I have a Table that has 3 columns: CustomerNum, OrderNum, OrderDate. There may(or may not) be many orders for each customer per date range. What I am needing is the last OrderNum for
There are two SQL tables: Parents: +--+---------+ |id|text| +--+---------+ 1|Blah| 2|Blah2| 3|Blah3| +--+---------+
I\'m trying开发者_StackOverflow中文版 to get the top 3 rows from col2 for each letter in col1 based on the count of col2
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