How to get customers overdue payment recovery in t-sql

Question

hi
i have developed a software for my customer. leasing software for leasing business. my customer has sell goods to their customers and recover payment on monthly installment basis. now my customer has required a report of none recovered customers payment
list how i can do in query. i mean how can i trace those customers which has not made monthly installment within any selected two dates
following is my recovery table structure which is master/detail
Customers table
CREATE TABLE [dbo].[Parties](
[PartyID] [int] NOT NULL,
[PartyName] [nvarchar](255) NULL,
[AreaID] [nvarchar](255) NULL,
[NameProduct] [nvarchar](255) NULL,
[TotalCost] [real] NULL,
[MonthlyInstallment] [real] NULL,
[InstallmentDate] [nvarchar](50) NULL,
 CONSTRAINT [PK_Parties] PRIMARY KEY CLUSTERED 
[PartyID] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]
RECOVERY MASTER TABLE
CREATE TABLE [dbo].[Recovery](
[TransID] [nvarchar](255) NOT NULL,
[TransDate] [datetime] NULL,
[AreaID] [nvarchar](50) NULL,
[Description] [nvarchar](255) NULL,
[NetRecovery] [decimal](18, 0) NULL,
[ProgramID] [int] NULL,
CONSTRAINT [Recovery$PrimaryKey] PRIMARY KEY CLUSTERED
[TransID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
and detail table structure is as under
CREATE TABLE [dbo].[RecoveryDetail](
[TransID] [nvarchar](255) NULL,
[PartyID] [int] NULL,
[PartyName] [nvarchar](255) NULL,
[AmountRecover] [float] NULL,
) ON [PRIMARY]
GO

Answer 1

Mmmhmm.
DDL: http://en.wikipedia.org/wiki/Data_definition_language a description of your data structures.
DML: http://en.wikipedia.org/wiki/Data_manipulation_language a description of how the data set is used or altered
Example:
DECLARE @customers TABLE (customerID INT IDENTITY, customerName VARCHAR(30))
DECLARE @leases TABLE (leaseID INT IDENTITY, customerID INT, totalAmount NUMERIC(10,4), paymentAmount NUMERIC(10,4), termMonths INT, paymentHistory VARCHAR(12), firstpaymentDate DATE, nextPaymentDate DATE, finalPaymentDate DATE)
INSERT INTO @customers (customerName)
VALUES ('Tinkywinky'),('Dipsy'),('La La'),('Po')
INSERT INTO @leases (customerID, totalAmount, paymentAmount, termMonths, paymentHistory, firstpaymentDate, nextPaymentDate, finalPaymentDate)
VALUES (1, 10000, 833.34, 12, 'NNNNNNN00000', '2014-7-1', '2014-12-1', '2015-6-1'),(2, 15000, 1000, 15, 'N01200000000', '2014-1-1', '2014-12-1', '2015-3-1'),
(3, 24000, 1000, 24, '000000000000', '2013-1-1', '2013-1-1', '2015-12-1'),(4, 48000, 1000, 48, '000000000000', '2013-1-1', '2013-1-1', '2017-12-1')