CREATE TABLE dbo.Table1
(
	Id INTEGER NOT NULL PRIMARY KEY CLUSTERED,
	Value VARCHAR(20) NOT NULL
);
GO
 
CREATE TABLE dbo.Table2
(
	Id INTEGER NOT NULL PRIMARY KEY CLUSTERED,
	Value VARCHAR(20) NOT NULL
);
GO
 
-- Trigger on table 1
CREATE TRIGGER dbo.trg_Table1 ON dbo.Table1
AFTER INSERT
AS
BEGIN
	DECLARE @nest INTEGER;
	SET @nest = TRIGGER_NESTLEVEL();
 
	IF (@nest = 1)
	BEGIN
		INSERT INTO dbo.Table2
		(
			Id,
			Value
		)
		SELECT i.Id,
			   i.Value
		FROM inserted i;
	END
	ELSE
	BEGIN
		PRINT 'Trigger 1: Insert aborted trigger_nestlevel is ' + CAST(@nest AS VARCHAR(10));
	END
END
GO
 
-- Trigger on table 2
CREATE TRIGGER dbo.trg_Table2 ON dbo.Table2
AFTER INSERT
AS
BEGIN
	DECLARE @nest INTEGER;
	SET @nest = TRIGGER_NESTLEVEL();
 
	IF (@nest = 1)
	BEGIN
		INSERT INTO dbo.Table1
		(
			Id,
			Value
		)
		SELECT i.Id,
			   i.Value
		FROM inserted i;
	END
	ELSE
	BEGIN
		PRINT 'Trigger 2: Insert aborted trigger_nestlevel is ' + CAST(@nest AS VARCHAR(10));
	END	
END
GO

INSERT INTO dbo.Table1
(
	Id,
	Value
)
VALUES
(
	1,
	'Blah'
);

SELECT *
FROM dbo.Table1
UNION ALL
SELECT * 
FROM dbo.Table2;

INSERT INTO dbo.Table2
(
	Id,
	Value
)
VALUES
(
	2,
	'Blah'
);

SELECT *
FROM dbo.Table1
UNION ALL
SELECT * 
FROM dbo.Table2;

SELECT 'Net Transport' AS Property, CONNECTIONPROPERTY('net_transport') AS Value
UNION ALL
SELECT 'Protocol type', CONNECTIONPROPERTY('protocol_type')
UNION ALL
SELECT 'Auth scheme', CONNECTIONPROPERTY('auth_scheme')
UNION ALL
SELECT 'Local net address', CONNECTIONPROPERTY('local_net_address')
UNION ALL
SELECT 'Local TCP port', CONNECTIONPROPERTY('local_tcp_port')
UNION ALL
SELECT 'Client net address', CONNECTIONPROPERTY('client_net_address');

SELECT ENCRYPTBYPASSPHRASE('secret', 'My very secret text');

SELECT DECRYPTBYPASSPHRASE('secret', 0x010000006CF61B39AAF0030FDCED9942BEEEE946CB4EDB0AF2C0CDBCFB0B0882A7B32B4975974D20C8A3C82D);

SELECT CONVERT(VARCHAR(100), DECRYPTBYPASSPHRASE('secret', 0x010000006CF61B39AAF0030FDCED9942BEEEE946CB4EDB0AF2C0CDBCFB0B0882A7B32B4975974D20C8A3C82D));

DECLARE @passwords TABLE
(
	pwd VARCHAR(100)
)
 
INSERT INTO @passwords
(
	pwd
)
SELECT 'thomas'
UNION ALL
SELECT 'arsenal'
UNION ALL
SELECT 'monkey'
UNION ALL
SELECT 'charlie'
UNION ALL
SELECT 'qwerty'
UNION ALL
SELECT '123456'
UNION ALL
SELECT 'letmein'
UNION ALL
SELECT 'liverpool'
UNION ALL
SELECT 'password'
UNION ALL
SELECT '123'
UNION ALL
SELECT '';
 
-- List bad users
SELECT l.[name],
	   l.[sid],
	   p.pwd
FROM sys.sql_logins l
INNER JOIN @passwords p
	ON PWDCOMPARE(p.pwd, l.password_hash) = 1;

SELECT @@CONNECTIONS AS ConnectionAttempts,
	   @@CPU_BUSY AS CpuTime,
	   @@IDLE AS IdleTime,
	   @@IO_BUSY AS IoTime,
	   @@PACKET_ERRORS AS PacketErrors,
	   @@PACK_RECEIVED AS PacketsReceived,
	   @@PACK_SENT AS PacketsSent,
	   @@TIMETICKS AS MicrosecondsPerTick, -- Computer dependant
	   @@TOTAL_ERRORS AS TotalDiskWriteErrors,
	   @@TOTAL_READ AS TotalDiskReads,
	   @@TOTAL_WRITE AS TotalDiskWrites;

SELECT *
FROM fn_virtualfilestats (DB_ID(), NULL);

WITH MyCTE
(
	Company,
	Telephone
)
AS
(
	SELECT 'ACME LTD', '0123456789'
	UNION ALL
	SELECT 'Big Corp', '0987654321'
	UNION ALL
	SELECT 'Bobs Bits', '9999999999'
	UNION ALL
	SELECT 'Daves Hardware', '000000000000'
	UNION ALL
	SELECT 'Maestrosoft', '111111111111'
	UNION ALL
	SELECT 'Boracle Corp', '333333333333'
	UNION ALL
	SELECT 'White Dwarf Microsystems', '5555555555555'
	UNION ALL
	SELECT 'Big Telecom', '4444444444444'
	UNION ALL
	SELECT 'DOL', '666666666666'
	UNION ALL 
	SELECT 'London Media Ltd', '888888888888'
)
SELECT Company,
	   Telephone,
	   NTILE(3) OVER(ORDER BY Company) AS [Group]
FROM MyCTE;

WITH MyCTE
(
	Division,
	[Quarter],
	Value
)
AS
(
	SELECT 'Sales 1', 1, 0.12
	UNION ALL
	SELECT 'Sales 1', 1, 0.34
	UNION ALL
	SELECT 'Sales 1', 2, 0.45
	UNION ALL
	SELECT 'Sales 2', 3, 0.77
	UNION ALL
	SELECT 'Sales 2', 1, 0.55
	UNION ALL
	SELECT 'Sales 1', 3, 0.78
	UNION ALL
	SELECT 'Sales 2', 2, 0.45
	UNION ALL
	SELECT 'Sales 2', 4, 0.67
	UNION ALL
	SELECT 'Sales 1', 4, 0.77
)
SELECT Division,
	   [Quarter],
	   SUM(Value) AS SummedValue,
	   GROUPING(Division) AS IsDivisionGroup,
	   GROUPING([Quarter]) AS IsQuarterGroup,
	   GROUPING_ID(Division, [Quarter])
FROM MyCTE
GROUP BY Division,
		 [Quarter]
WITH ROLLUP
ORDER BY GROUPING_ID(Division, [Quarter]);

WITH MyCTE
(
	Division,
	[Quarter],
	Value
)
AS
(
	SELECT 'Sales 1', 1, 0.12
	UNION ALL
	SELECT 'Sales 1', 1, 0.34
	UNION ALL
	SELECT 'Sales 1', 2, 0.45
	UNION ALL
	SELECT 'Sales 2', 3, 0.77
	UNION ALL
	SELECT 'Sales 2', 1, 0.55
	UNION ALL
	SELECT 'Sales 1', 3, 0.78
	UNION ALL
	SELECT 'Sales 2', 2, 0.45
	UNION ALL
	SELECT 'Sales 2', 4, 0.67
	UNION ALL
	SELECT 'Sales 1', 4, 0.77
)
SELECT Division,
	   [Quarter],
	   SUM(Value) AS SummedValue,
	   GROUPING(Division) AS IsDivisionGroup,
	   GROUPING([Quarter]) AS IsQuarterGroup
FROM MyCTE
GROUP BY Division,
		 [Quarter]
WITH ROLLUP;

SELECT APP_NAME();

DECLARE @TABLE_SCHEMA NVARCHAR(100),
        @TABLE_NAME NVARCHAR(100),
        @COLUMN_NAME NVARCHAR(100),
        @sql NVARCHAR(1000),
        @count INTEGER;
 
DECLARE columnCursor CURSOR LOCAL FAST_FORWARD FOR SELECT c.TABLE_SCHEMA,
                                                          c.TABLE_NAME,
                                                          c.COLUMN_NAME
						   FROM INFORMATION_SCHEMA.COLUMNS c
                                                   INNER JOIN INFORMATION_SCHEMA.TABLES t 
                                                       ON t.TABLE_CATALOG = c.TABLE_CATALOG
                                                       AND t.TABLE_SCHEMA = c.TABLE_SCHEMA
                                                       AND t.TABLE_NAME = c.TABLE_NAME
                                                   WHERE c.IS_NULLABLE = 'YES'
                                                   AND t.TABLE_TYPE = 'BASE TABLE';
 
OPEN columnCursor;
FETCH NEXT FROM columnCursor INTO @TABLE_SCHEMA,
                                  @TABLE_NAME,
                                  @COLUMN_NAME;
 
WHILE (@@FETCH_STATUS = 0)
BEGIN
 
                SET @sql = N'SELECT @count = COUNT(*) FROM [' + @TABLE_SCHEMA + '].[' + @TABLE_NAME + '] WHERE [' + @COLUMN_NAME + '] IS NULL';
 
                EXECUTE sp_executesql @query = @sql,
                                      @params = N'@count INTEGER OUTPUT',
                                      @count = @count OUTPUT;
 
                IF(@count = 0)
                BEGIN
 
                        PRINT @COLUMN_NAME + ' in ' + @TABLE_SCHEMA + '.' + @TABLE_NAME + ' is nullable but contains no nulls.';
 
                END;
 
                FETCH NEXT FROM columnCursor INTO @TABLE_SCHEMA,
                                                  @TABLE_NAME,
                                                  @COLUMN_NAME
END;
 
CLOSE columnCursor;
DEALLOCATE columnCursor;