Merge pull request #213 from samuelkaranja/main

Split column values into multiple columns

Author: brownksc

sql-queries-5/split-column-values-into-multiple-columns/split-column-values-into-multiple-columns-mysql.sql

@@ -0,0 +1,29 @@
+-- Using SUBSTRING_INDEX Function
+
+SELECT 
+    SUBSTRING_INDEX(column_name, ' ', 1) AS new_column_name_1, 
+    SUBSTRING_INDEX(column_name, ' ', -1) AS new_column_name_2 
+FROM 
+    table_name;
+   
+-- Handling More Complex Scenarios
+   
+SELECT 
+    SUBSTRING_INDEX(column_name, ' ', 1) AS new_column_name_1, 
+    SUBSTRING(column_name, LOCATE(' ', column_name) + 1, LOCATE(' ', column_name, LOCATE(' ', column_name) + 1) - LOCATE(' ', column_name) - 1) AS new_column_name_2, 
+    SUBSTRING_INDEX(column_name, ' ', -1) AS new_column_name_3
+FROM 
+    table_name;
+   
+-- Handling Extra Spaces and Multiple Delimiters
+
+SELECT 
+    SUBSTRING_INDEX(TRIM(REPLACE(column_name, '  ', ' ')), ' ', 1) AS new_column_name_1, 
+    SUBSTRING_INDEX(TRIM(REPLACE(column_name, '  ', ' ')), ' ', -1) AS new_column_name_2 
+FROM table_name;
+
+
+SELECT 
+    SUBSTRING_INDEX(REPLACE(REPLACE(column_name, '-', ' '), '_', ' '), ' ', 1) AS new_column_name_1, 
+    SUBSTRING_INDEX(REPLACE(REPLACE(column_name, '-', ' '), '_', ' '), ' ', -1) AS new_column_name_2 
+FROM table_name;

sql-queries-5/split-column-values-into-multiple-columns/split-column-values-into-multiple-columns-postgresql.sql

@@ -0,0 +1,33 @@
+-- Using SPLIT_PART Function
+
+SELECT 
+    SPLIT_PART(column_name, ' ', 1) AS new_column_name_1, 
+    SPLIT_PART(column_name, ' ', 2) AS new_column_name_2
+FROM table_name;
+
+-- Using STRING_TO_ARRAY Function
+
+WITH name_array AS (
+    SELECT 
+        STRING_TO_ARRAY(column_name, ' ') AS name_parts
+    FROM table_name 
+)
+SELECT 
+    name_parts[1] AS new_column_name_1, 
+    name_parts[2] AS new_column_name_2 
+FROM name_array;
+
+-- Handling More Complex Scenarios
+
+WITH name_array AS (
+   SELECT 
+       STRING_TO_ARRAY(column_name, ' ') AS name_parts
+   FROM table_name 
+) 
+SELECT 
+    name_parts[1] AS new_column_name_1,
+    CASE WHEN array_length(name_parts, 1) = 3 THEN name_parts[2] END AS new_column_name_2,
+    CASE WHEN array_length(name_parts, 1) = 3 THEN name_parts[3] 
+         WHEN array_length(name_parts, 1) = 2 THEN name_parts[2] 
+    END AS new_column_name_3 
+FROM name_array;