Beautify

database-commands/mysql_commands.rst

@@ -68,15 +68,15 @@ Create Alias (alternate names) a column
 .. code-block:: sql
 
    SELECT Name AS 'country-name', Population as 'country-population'
-   FROM country;
+   FROM Country;
 
 
 Order the rows by Name column in ascending order
 
 .. code-block:: sql
 
    SELECT * 
-   FROM country 
+   FROM Country 
    ORDER BY Name ASC;
 
 
@@ -85,7 +85,7 @@ Order the rows by Name column in descending order
 .. code-block:: sql
 
    SELECT * 
-   FROM country 
+   FROM Country 
    ORDER BY Name DESC;
 
 
@@ -94,7 +94,7 @@ First order by Continent and then Name within each Continent
 .. code-block:: sql
 
    SELECT Name, Continent 
-   FROM country 
+   FROM Country 
    ORDER BY Continent, Name DESC;
 
 
@@ -103,7 +103,7 @@ Order by content name in descending order and then name in ascending order
 .. code-block:: sql
 
    SELECT Name, Continent 
-   FROM country 
+   FROM Country 
    ORDER BY Continent DESC, Name;
 
 
@@ -119,93 +119,101 @@ Offset
 
 .. code-block:: sql
 
-   SELECT * from Country ORDER BY Name LIMIT 5 OFFSET 5;
+   SELECT * 
+   FROM Country 
+   ORDER BY Name 
+   LIMIT 5 OFFSET 5;
 
 Where clause
 
 .. code-block:: sql
 
-   SELECT Name,Code,population from Country WHERE population > 100000000 ORDER BY population;
+   SELECT Name, Code, Population 
+   FROM Country 
+   WHERE Population > 100000000 
+   ORDER BY Population;
 
 Null clause
 
 .. code-block:: sql
 
-   SELECT Name,Code,population 
+   SELECT Name, Code, Population 
    FROM Country  
-   WHERE population > 100000000 OR population IS NULL
-   ORDER BY population;
+   WHERE Population > 100000000 OR Population IS NULL
+   ORDER BY Population;
 
 
 OR clause
 
 .. code-block:: sql
 
-   SELECT Name,Code,population 
+   SELECT Name, Code, Population 
    FROM Country 
-   WHERE population > 100000000 OR population IS NULL
-   ORDER BY population;
+   WHERE Population > 100000000 OR Population IS NULL
+   ORDER BY Population;
 
 
 NOT Null clause
 
 .. code-block:: sql
 
-   SELECT Name,Code,population 
+   SELECT Name, Code, Population 
    FROM Country 
-   WHERE population > 100000000 OR population IS NOT NULL
-   ORDER BY population;
+   WHERE Population > 100000000 OR Population IS NOT NULL
+   ORDER BY Population;
 
 
-Null clause
+AND clause
 
 .. code-block:: sql
 
-   SELECT Name,Code,population 
+   SELECT Name, Code, Population 
    FROM Country 
-   WHERE population > 100000000 AND continent = 'Asia'
-   ORDER BY population;
+   WHERE Population > 100000000 AND Continent = 'Asia'
+   ORDER BY Population;
 
 Where clause with string match
 
 .. code-block:: sql
 
-   SELECT Name,Code from Country WHERE Code = 'USA’;
+   SELECT Name, Code 
+   FROM Country 
+   WHERE Code = 'USA’;
 
 
 Like clause
 
 .. code-block:: sql
 
-   SELECT Name, continent, population 
+   SELECT Name, Continent, Population 
    FROM Country 
-   WHERE name like 'ind%’;
+   WHERE Name LIKE 'ind%’;
 
 
 Like clause with single character
 
 .. code-block:: sql
 
-   SELECT Name, continent, population 
+   SELECT Name, Continent, Population 
    FROM Country 
-   WHERE name like ‘_a%’;
+   WHERE Name LIKE ‘_a%’;
 
 
 IN clause
 
 .. code-block:: sql
 
-   SELECT Name, continent, population 
+   SELECT Name, Continent, Population 
    FROM Country
-   WHERE continent IN ('Asia', 'Europe')
-   ORDER BY continent;
+   WHERE Continent IN ('Asia', 'Europe')
+   ORDER BY Continent;
 
 
 Regex
 
 .. code-block:: sql
 
-   SELECT Name, continent, population 
+   SELECT Name, Continent, Population 
    FROM Country 
    WHERE Name REGEXP '^.[a-d].*’;
 
@@ -221,7 +229,7 @@ Insert row
 .. code-block:: sql
 
    INSERT INTO test 
-   VALUES (1, 'First Value’, ’Second Value')
+   VALUES (1, 'First Value’, ’Second Value');
 
 
 Insert row specifying the columns
@@ -244,7 +252,8 @@ Updating a row
 
 .. code-block:: sql
 
-   UPDATE test SET c = ’Something else’
+   UPDATE test 
+   SET c = ’Something else’
    WHERE a = 1;
 
 
@@ -254,7 +263,7 @@ Delete a row with only its first occurrance
 
    DELETE
    FROM test
-   WHERE a=1
+   WHERE a = 1
    LIMIT 1;
    SELECT * FROM test;
 
@@ -263,7 +272,7 @@ Delete a table
 
 .. code-block:: sql
 
-   DROP TABLE test
+   DROP TABLE test;
 
 
 Describe table <— MySQL specific
@@ -284,7 +293,7 @@ Index while creating table
 
 .. code-block:: sql
 
-   INDEX(a)
+   INDEX(a);
 
 
 Show index
@@ -298,21 +307,24 @@ Modify the table at a later stage
 
 .. code-block:: sql
 
-   ALTER TABLE test ADD d VARCHAR(10);
+   ALTER TABLE test 
+   ADD d VARCHAR(10);
 
 Remove a column
 
 .. code-block:: sql
 
-   ALTER TABLE test DROP d;
+   ALTER TABLE test 
+   DROP d;
 
 Add a column with more options
 
 .. code-block:: sql
 
    ALTER TABLE test 
    ADD d VARCHAR(10) 
-   AFTER a DEFAULT ’something’;
+   AFTER a 
+   DEFAULT ’something’;
 
 
 Timezone
@@ -328,7 +340,10 @@ String functions - Length of a value <— counts the bytes
 
 .. code-block:: sql
 
-   SELECT Name, LocalName, Length(LocalName) AS len FROM Country where Continent = 'Europe' ORDER BY len;
+   SELECT Name, LocalName, Length(LocalName) AS len 
+   FROM Country 
+   WHERE Continent = 'Europe' 
+   ORDER BY len;
 
 CHAR_LENGTH counts characters
 
@@ -392,7 +407,10 @@ GROUP BY
 
 .. code-block:: sql
 
-   SELECT Continent, COUNT(*) as count from Country GROUP BY Continent ORDER BY count DESC;
+   SELECT Continent, COUNT(*) as Count 
+   FROM Country 
+   GROUP BY Continent 
+   ORDER BY Count DESC;
 
 
 Scan the table and get the count of distinct values