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show me a sample sql using the 'having' clause on ...

Tạo vào: 14 tháng 1, 2026

Trả lời bằng GPT-5.2 Thinking bởi Chat01

Câu hỏi

show me a sample sql using the 'having' clause on ibm's 'sample' db tables

Suy nghĩ

Providing additional sample SQL queries

I'll create sample queries using the SALES table to show salespeople who sold 20+ units in 2006, grouped by salesperson and region. I'll also include an example for the STAFF table, showing departments with an average salary over 18,000 and at least 3 employees. I'll note that HAVING filters aggregate groups, and WHERE should be used for row-level filtering.

Crafting SQL queries with JOIN and HAVING

I'll write a query to show salespeople (from the STAFF table) with total 2006 sales above 25, including their salary and commission. This will use a JOIN between the STAFF and SALES tables, filtered with HAVING and GROUP BY for sales over 25. I’ll ensure database-specific formatting like DECIMAL for salary and average calculations.

Crafting SQL query with staff and sales join

The query joins the STAFF and SALES tables based on matching salesperson names and filters sales from 2006 where total sales exceed 25 units. It groups data by staff details and salary, ensuring conditions are met with HAVING. Schema names such as "DB2INST1" should be qualified when needed. This uses SAMPLE’s STAFF and SALES tables (see IBM docs).

Thought for 1m 2s

Trả lời

Here’s a Db2 “SAMPLE” example that uses HAVING to filter aggregated results (total sales per salesperson), using the SALES and STAFF sample tables. (IBM)

sql
-- Salespeople whose total unit sales in 2006 are >= 25
-- (Qualify the tables with your schema if needed, e.g. DB2INST1.SALES / DB2INST1.STAFF)

SELECT
    st.id,
    st.name,
    st.dept,
    st.salary,
    SUM(sa.sales) AS total_units_sold_2006
FROM staff st
JOIN sales sa
  ON UPPER(sa.sales_person) = UPPER(st.name)   -- SALES_PERSON is last name in SAMPLE
WHERE sa.sales_date >= DATE('2006-01-01')
  AND sa.sales_date <  DATE('2007-01-01')
GROUP BY
    st.id, st.name, st.dept, st.salary
HAVING SUM(sa.sales) >= 25
ORDER BY total_units_sold_2006 DESC;

WHERE limits rows before grouping (here: only 2006 rows), while HAVING limits the groups after SUM(...) is computed.

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