静态查询(就Bob和Sue而言)可能看起来像这样

A static query (as far as only Bob and Sue are concerned) might look like this

SELECT subject, 
       MAX(CASE WHEN name = 'Bob' THEN grade END) `Bob`,
       MAX(CASE WHEN name = 'Sue' THEN grade END) `Sue` 
  FROM table1 
 GROUP BY subject

现在可以使用其他动态SQL来解释其他名称

Now to be able to account for other names use dynamic SQL like this

SET @sql = NULL;

SELECT GROUP_CONCAT(DISTINCT
         CONCAT('MAX(CASE WHEN name = ''', name,
                ''' THEN grade END) `', name, '`'))
  INTO @sql
  FROM table1;

SET @sql = CONCAT('SELECT subject, ', @sql, ' 
                     FROM table1 
                    GROUP BY subject');

PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

输出:

|   SUBJECT |    BOB |    SUE |
|-----------|--------|--------|
|   Biology |      D | (null) |
| Geography | (null) |      C |
|   History |      B |      C |
|  Language |      C | (null) |
|      Math |      A |      A |
|     Music | (null) |      A |

这里是 SQLFiddle 演示

Here is SQLFiddle demo

您可以将其包装到存储过程中，以简化调用端的操作

You can wrap it into a stored procedure to simplify things on the calling end

DELIMITER $$
CREATE PROCEDURE sp_grade_report()
BEGIN
  SET @sql = NULL;

  SELECT GROUP_CONCAT(DISTINCT
           CONCAT('MAX(CASE WHEN name = ''', name,
                  ''' THEN grade END) `', name, '`'))
    INTO @sql
    FROM table1;

  SET @sql = CONCAT('SELECT subject, ', @sql, ' 
                       FROM table1 
                      GROUP BY subject');

  PREPARE stmt FROM @sql;
  EXECUTE stmt;
  DEALLOCATE PREPARE stmt;
END$$
DELIMITER ;

样品用量:

CALL sp_grade_report();

这里是 SQLFiddle 演示

Here is SQLFiddle demo