Question

I have a Table Like Below

CREATE TABLE Statistics(Stat_Id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
                        Period  VARCHAR(55),
                        Location VARCHAR(255),
                        Rate_per_SqFt INT)

The Datas in the Table are

INSERT INTO Statistics(Period, Location, Rate_per_SqFt)
                VALUES('June', 'Location A', 2500),
                      ('June', 'Location B', 2740),
                      ('June', 'Location C', 3200),
                      ('July', 'Location A', 2650),
                      ('July', 'Location B', 2800),
                      ('July', 'Location C', 3250),
                      ('August', 'Location A', 2750),
                      ('August', 'Location B', 2950),
                      ('August', 'Location C', 3230),
                      ('October', 'Location A', 2950),
                      ('October', 'Location B', 3950),
                      ('October', 'Location C', 3530);

I want the Rows for Particular Month Displayed in Output as Separate Columns as Below

 Period   Location A     Location B     Location C 
 June        2500          2740           3200
 July        2650          2800           3250
 August      2750          2950           3230
 October     2950          3950           3530  

How can I do this using Query

Answer 1

SELECT Period,
        MAX(CASE WHEN Location = 'Location A' THEN Rate_per_SqFt ELSE NULL END) `Location A`,
        MAX(CASE WHEN Location = 'Location B' THEN Rate_per_SqFt ELSE NULL END) `Location B`,
        MAX(CASE WHEN Location = 'Location C' THEN Rate_per_SqFt ELSE NULL END) `Location C`
FROM statistics
GROUP BY Period

• SQLFiddle Demo Link

if you have unknown number of locations, a Dynamic SQL is preferred

SET @sql = NULL;
SELECT
  GROUP_CONCAT(DISTINCT
    CONCAT(
      'MAX(CASE WHEN Location = ''',
      Location,
      ''' then Rate_per_SqFt ELSE NULL end) AS ',
      CONCAT('`',Location,'`')
    )
  ) INTO @sql
FROM statistics;

SET @sql = CONCAT('SELECT Period, ', @sql, ' 
                   FROM Statistics 
                   GROUP BY Period');

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

• SQL Fiddle Demo Link