Create FUNCTION TO find TAX in sqlserver

CREATE FUNCTION F_Get_IncommTaxx(@sal money) -- 2500000 RETURNS money -- SELECT DBO.F_Get_IncommTaxx(300000) AS BEGIN       DECLARE @R_sal MONEY=@sal-150000 -- 350000       DECLARE @tax MONEY =0        IF(@R_sal>0 AND @R_sal<=100000)        BEGIN             SET @tax=(@R_sal *10)/100             SET @R_sal=@R_sal-100000        END        ELSE IF(@R_SAL>0)        BEGIN             SET @tax=(100000 *10)/100 -- 10000             set @R_sal=@R_sal-100000  -- 250000        END        -- 20% slab        if(@R_sal>0 AND @R_sal<=200000)        BEGIN             SET @tax=@tax+((@R_sal *20)/100)             SET @R_sal=@R_sal-200000        END        ELSE IF(@R_SAL>0)        BEGIN             SET @tax=@tax+((200000 *20)/100) -- 50000             SET @R_sal=@R_sal-200000          END                -- 30% slab        IF(@R_sal>0 )        BEGIN             SET @tax=@tax+((@R_sal *30)/100) -- 65500        END                      RETURN @tax; END

SET NUMBER of RECORDS per PAGE in SQLSERVER

PAGING in SQL SERVER

USE AdventureWorksDW
GO
CREATE PROC usp_paging(@NOOFRECORDS INT,@PAGENO INT)
AS
--EXEC usp_paging 10,2
BEGIN

DECLARE @STING INT=((@PAGENO-1)*@NOOFRECORDS)+1
DECLARE @ENDING INT=@NOOFRECORDS*@PAGENO
PRINT @STING
PRINT @ENDING
;WITH X AS(
SELECT *,DENSE_RANK() OVER (ORDER BY TIMEKEY)AS DENSERANK
,RANK() OVER (ORDER BY TIMEKEY) AS RANK,
ROW_NUMBER() OVER(PARTITION BY TIMEKEY ORDER BY TIMEKEY)AS ROWNUMBER  FROM FactFinance)
SELECT * FROM X WHERE ROWNUMBER=1 AND DENSERANK BETWEEN @STING AND @ENDING
ORDER BY TimeKey
END

Results:

IGNORE Duplicates while inserting NEW Records

SQL Constraint IGNORE_DUP_KEY on Update

The below example gives you a better identification on IGNORE_DUP_KEY.

      Specifies the error response when an insert operation attempts to insert duplicate key values into a unique index. The IGNORE_DUP_KEY option applies only to insert operations after the index is created or rebuilt. The option has no effect when executing CREATE INDEX, ALTER INDEX, or UPDATE. The default is OFF.

IMPORTANT Note:

         IGNORE_DUP_KEY cannot be set to ON  for indexes created on a view, non-unique indexes, XML indexes, spatial indexes, and filtered indexes.

In backward compatible syntax, WITH IGNORE_DUP_KEY is equivalent to WITH IGNORE_DUP_KEY = ON.

ON
A warning message will occur when duplicate key values are inserted into a unique index. Only the rows violating the uniqueness constraint will fail.

OFF
An error message will occur when duplicate key values are inserted into a unique index. The entire INSERT operation will be rolled back

CREATE TABLE #Big (pk int NOT NULL CONSTRAINT PK_Big PRIMARY KEY)
GO
-- Start with values 1 & 5 in the table

INSERT #Big (pk) VALUES (1), (5);

-- Our batch transaction
BEGIN TRANSACTION;
    -- Insert a batch containing some pre-existing rows
    INSERT #Big (pk) VALUES (1), (2), (3), (4), (5);

    -- Show the contents of the table after the insert statement
    SELECT pk FROM #Big;

    -- Show the transaction count
    SELECT tran_count = @@TRANCOUNT;

 -- Rollback
ROLLBACK TRANSACTION;

-- Final table contents
SELECT pk FROM #Big;
GO
-- Tidy up
DROP TABLE #Big;

Result:

CREATE TABLE #Big (pk int NOT NULL CONSTRAINT PK_Big PRIMARY KEY) WITH (IGNORE_DUP_KEY = ON));
GO
-- Start with values 1 & 5 in the table


INSERT #Big (pk) VALUES (1), (5);

-- Our batch transaction
BEGIN TRANSACTION;
    -- Insert a batch containing some pre-existing rows
    INSERT #Big (pk) VALUES (1), (2), (3), (4), (5);

    -- Show the contents of the table after the insert statement
    SELECT pk FROM #Big;

    -- Show the transaction count
    SELECT tran_count = @@TRANCOUNT;

 -- Rollback
ROLLBACK TRANSACTION;

-- Final table contents
SELECT pk FROM #Big;
GO
-- Tidy up
DROP TABLE #Big;

Result:

If we want to add IGNORE_DUP_KEY on primary key existing, first drop the CONSTRAINT then recreate along with WITH(IGNORE_DUP_KEY=ON)
Drop and alter of a table are the examples shown below

CREATE TABLE #Big (pk int not null CONSTRAINT pk_key primary key WITH(IGNORE_DUP_KEY=ON))
INSERT INTO #Big VALUES(1),(2),(3)
INSERT INTO #Big VALUES(2),(5),(6)
ALTER TABLE #BIG DROP CONSTRAINT PK_KEY
alter table #big add constraint pk_key primary key(PK) WITH(IGNORE_DUP_KEY=ON)