Find the most westerly and easterly points : Point « Geometric « SQL / MySQL

1. SQL / MySQL
2. Geometric
3. Point

Find the most westerly and easterly points

    
mysql>
mysql>
mysql>
mysql>
mysql> CREATE TABLE mytable (
    -> id INT NOT NULL PRIMARY KEY,
    -> border POLYGON NOT NULL,
    -> ela LINESTRING NOT NULL,
    -> ref POINT NOT NULL,
    -> name VARCHAR(20),
    -> SPATIAL KEY(border),
    -> SPATIAL KEY(ela),
    -> SPATIAL KEY(ref) );
Query OK, 0 rows affected (0.00 sec)

mysql>
mysql>
mysql> INSERT INTO mytable VALUES ( 1,
    -> GEOMFROMTEXT('POLYGON(
    '> (25 15,10 25,25 35,30 50,30 60,
    '> 35 65,40 55,45 30,55 20,25 15),
    '> (3395 2827,3861 2840,4094 2374,3395 2594,3395 2827)
    '> )'),
    -> GEOMFROMTEXT('LINESTRING(25 35, 45 30)'),
    -> GEOMFROMTEXT('POINT(2850 2350)'), 'gl_1');
Query OK, 1 row affected (0.00 sec)

mysql>
mysql>
mysql> INSERT INTO mytable VALUES ( 2,
    -> GEOMFROMTEXT('POLYGON((70 20,55 20,65 30,
    '> 65 50,70 55,80 50,85 40,80 30,
    '> 85 25,70 20))'),
    -> GEOMFROMTEXT('LINESTRING(65 35, 80 30)'),
    -> GEOMFROMTEXT('POINT(7250 2750)'), 'gl_2');
Query OK, 1 row affected (0.00 sec)

mysql>
mysql>
mysql>
mysql>
mysql> SELECT MIN(X(ref)), MAX(X(ref)) FROM mytable;
+-------------+-------------+
| MIN(X(ref)) | MAX(X(ref)) |
+-------------+-------------+
|        2850 |        7250 |
+-------------+-------------+
1 row in set (0.00 sec)

mysql>
mysql> drop table mytable;
Query OK, 0 rows affected (0.00 sec)

   
    
    
    
  

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