Figure 2 ErrorLog Table
　

CREATE TABLE ErrorLog
(
  lsn       INT          NOT NULL IDENTITY PRIMARY KEY,
  dt        DATETIME     NOT NULL DEFAULT(GETDATE()),
  errid     INT          NOT NULL,
  comments  VARCHAR(100) NOT NULL
)

CREATE TABLE T1(col1 INT NOT NULL PRIMARY KEY)
CREATE TABLE T2(col1 INT NOT NULL PRIMARY KEY)
INSERT INTO T1 VALUES(1)
INSERT INTO T2 VALUES(1)
GO