"2022年SQL语句生成成果统计表"

summary; The given content describes a simple SQL interview question related to the group by clause. The question states that there is a table with the following data: -05-09 Winning -05-09 Winning -05-09 Losing -05-09 Losing -05-10 Winning -05-10 Losing -05-10 Losing The objective is to generate the following result using SQL query: Winning Losing -05-09 2 2 -05-10 1 2 To achieve this result, you need to manipulate the table using the group by clause. First, you would create a table by the name of your choice using the 'create table' statement. The structure of the table would depend on the columns required to store the result. In this case, you would have two columns: 'Winning' and 'Losing'. Next, you would write the SQL query to generate the desired result. To accomplish this, you would use the 'group by' clause to group the records based on the date ('-05-09' and '-05-10'). Then, you would use the 'count' function to count the occurrences of 'Winning' and 'Losing' for each date. Here is an example of how the SQL query might look like: SELECT date, SUM(CASE WHEN result = 'Winning' THEN 1 ELSE 0 END) AS Winning, SUM(CASE WHEN result = 'Losing' THEN 1 ELSE 0 END) AS Losing FROM your_table GROUP BY date; In this query, 'your_table' should be replaced with the name of the actual table containing the data. The 'date' column represents the dates '-05-09' and '-05-10' in this case. 'result' refers to the column containing 'Winning' and 'Losing' values. By running this query, you would obtain the desired result: Winning Losing -05-09 2 2 -05-10 1 2 In conclusion, to generate the given result using SQL, you would need to define a table structure, write the SQL query using the group by clause, and execute the query on the appropriate table.