Sql Constraint To Check Date Less Than Current Date

Table of contents
• CHECK constraint on date of birth?
• SQL CHECK Constraint
• Using date in a check constraint, Oracle
• SQL Query to Check if Date is Greater Than Today in SQL
• Sql server check end date is greater than start date

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CHECK constraint on date of birth?

, emp_dob DATE NOT NULL

    CREATE TABLE employee(emp_id NUMBER(4) PRIMARY KEY
, emp_name VARCHAR2(40) NOT NULL
, emp_address VARCHAR2(60) NOT NULL
, emp_tel NUMBER(11) NOT NULL
, CONSTRAINT emp_tel_length CHECK (LENGTH(emp_tel) BETWEEN 9 and 11)
, emp_dob DATE NOT NULL
, CONSTRAINT check_date_of_birth CHECK (emp_dob BETWEEN DATE '1950-01-01' AND sysdate))

SQL> ed
Wrote file afiedt.buf

  1  create table t(
  2      birth_date date check( birth_date between date '1900-01-01' and
  3                                                sysdate )
  4* )
SQL> /
                                              sysdate )
                                              *
ERROR at line 3:
ORA-02436: date or system variable wrongly specified in CHECK constraint

SQL> ed
Wrote file afiedt.buf

  1   create table t(
  2       birth_date date check( birth_date between date '1900-01-01' and
  3                                                 date '2011-12-08' )
  4*  )
SQL> /

Table created.

CREATE OR REPLACE TRIGGER check_birth_date
  BEFORE INSERT OR UPDATE ON employee
  FOR EACH ROW
BEGIN
  IF( :new.emp_dob < date '1900-01-01' or 
      :new.emp_dob > sysdate )
  THEN
    RAISE_APPLICATION_ERROR( 
      -20001, 
      'EMployee date of birth must be later than Jan 1, 1900 and earlier than today' );
  END IF;
END;

CREATE DOMAIN birthdate AS date DEFAULT NULL
    CHECK (value >= '1900-01-01' AND value <= now())
    ;

CREATE TABLE employee
    ( empno INTEGER NOT NULL PRIMARY KEY
    , dob birthdate NOT NULL
    ...
    );

CREATE TABLE "AB_EMPLOYEE22"
(
   "NAME"     VARCHAR2 ( 20 BYTE ),
   "AGE"      NUMBER,
   "SALARY"   NUMBER,
   "DOB"      DATE,
   "DOJ"      DATE DEFAULT SYSDATE
);

Table Created    

ALTER TABLE "AB_EMPLOYEE22" ADD CONSTRAINT
AGE_CHECK CHECK((ROUND((DOJ-DOB)/365)) = AGE) ENABLE;

Table Altered

CREATE TABLE EMPLOYEE(
    NAME VARCHAR(20) NOT NULL,
    DOB DATE NOT NULL,
    DATE_JOINING DATE DEFAULT NOW(),
    AGE INTEGER DEFAULT TIMESTAMPDIFF(YEAR,DOB,DATE_JOINING) CHECK(AGE>20)
    );

INSERT INTO EMPLOYEE(NAME,DOB) VALUES('NAYAK','1998-2-3');
Query OK, 1 row affected, 1 warning (0.128 sec)

SELECT * FROM EMPLOYEE;
+-------+------------+--------------+------+
| NAME  | DOB        | DATE_JOINING | AGE  |
+-------+------------+--------------+------+
| NAYAK | 1998-02-03 | 2019-10-15   |   21 |
+-------+------------+--------------+------+
1 row in set (0.001 sec)

INSERT INTO EMPLOYEE(NAME,DOB) VALUES('NIRAJAN','2005-2-3');
ERROR 4025 (23000): CONSTRAINT `EMPLOYEE.AGE` failed for `NAYAK`.`EMPLOYEE`

ALTER TABLE "students"
  ADD CONSTRAINT "students_must_be_over_18" CHECK (
    CURRENT_TIMESTAMP - "date_of_birth" > INTERVAL '18 years'
  );

SQL CHECK Constraint

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}enddate >= begindate AND begindate >= '1970-01-01'Code language: JavaScript (javascript)

CREATE TABLE batches (
  batchid int(11) NOT NULL,
  batchname varchar(255) NOT NULL,
  begindate date NOT NULL,
  enddate date NOT NULL,
  courseid int(11) NOT NULL,
  PRIMARY KEY (batchid),
  CONSTRAINT fk_courseid FOREIGN KEY (courseid) REFERENCES courses (courseid),
  CONSTRAINT chk_date CHECK(enddate >= begindate AND begindate >= '1970-01-01')
)Code language: PHP (php)

CONSTRAINT chk_date CHECK(enddate >= begindate AND begindate >= '1970-01-01')Code language: JavaScript (javascript)

enddate >= begindate AND begindate >= '1970-01-01'Code language: JavaScript (javascript)

ALTER TABLE batches
ADD CONSTRAINT chk_date 
CHECK(enddate >= begindate AND begindate >= '1970-01-01')Code language: JavaScript (javascript)

ALTER TABLE batches
DROP CONSTRAINT chk_date

Using date in a check constraint, Oracle

ALTER TABLE Table1
ADD (CONSTRAINT GT_Table1_CloseDate
CHECK (CloseDate > SYSDATE),
CONSTRAINT LT_Table1_CloseDate
CHECK (CloseDate <= SYSDATE + 365)),
CONSTRAINT GT_Table1_StartDate
CHECK (StartDate > (CloseDate + (SYSDATE + 730))));

Error report:
SQL Error: ORA-02436: date or system variable wrongly specified in CHECK constraint
02436. 00000 -  "date or system variable wrongly specified in CHECK constraint"
*Cause:    An attempt was made to use a date constant or system variable,
           such as USER, in a check constraint that was not completely
           specified in a CREATE TABLE or ALTER TABLE statement.  For
           example, a date was specified without the century.
*Action:   Completely specify the date constant or system variable.
           Setting the event 10149 allows constraints like "a1 > '10-MAY-96'",
           which a bug permitted to be created before version 8.

CREATE OR REPLACE TRIGGER trg_check_dates
  BEFORE INSERT OR UPDATE ON table1
  FOR EACH ROW
BEGIN
  IF( :new.CloseDate <= SYSDATE )
  THEN
    RAISE_APPLICATION_ERROR( -20001, 
          'Invalid CloseDate: CloseDate must be greater than the current date - value = ' || 
          to_char( :new.CloseDate, 'YYYY-MM-DD HH24:MI:SS' ) );
  END IF;
  IF( :new.CloseDate > add_months(SYSDATE,12) )
  THEN
    RAISE_APPLICATION_ERROR( -20002, 
         'Invalid CloseDate: CloseDate must be within the next year - value = ' || 
         to_char( :new.CloseDate, 'YYYY-MM-DD HH24:MI:SS' ) );
  END IF;
  IF( :new.StartDate <= add_months(:new.CloseDate,24) )
  THEN
    RAISE_APPLICATION_ERROR( -20002, 
          'Invalid StartDate: StartDate must be within 24 months of the CloseDate - StartDate = ' || 
          to_char( :new.StartDate, 'YYYY-MM-DD HH24:MI:SS' ) ||
          ' CloseDate = ' || to_char( :new.CloseDate , 'YYYY-MM-DD HH24:MI:SS' ) );
  END IF;
END;

CREATE TABLE "AB_EMPLOYEE22"
(
   "NAME"     VARCHAR2 ( 20 BYTE ),
   "AGE"      NUMBER,
   "SALARY"   NUMBER,
   "DOB"      DATE,
   "DOJ"      DATE DEFAULT SYSDATE
);

Table Created    

ALTER TABLE "AB_EMPLOYEE22" ADD CONSTRAINT
AGE_CHECK CHECK((ROUND((DOJ-DOB)/365)) = AGE) ENABLE;

Table Altered

CREATE OR REPLACE FUNCTION SYSDATE_DETERMINISTIC RETURN DATE DETERMINISTIC IS
BEGIN
    RETURN SYSDATE;
END SYSDATE_DETERMINISTIC;
/

CREATE TABLE Table1 (
   s_date DATE, 
   C_DATE DATE GENERATED ALWAYS AS ( SYSDATE_DETERMINISTIC() ) 
);

ALTER TABLE Table1 ADD CONSTRAINT s_check CHECK ( s_date < C_DATE );

 ALTER TABLE Table1
 ADD (REGISTER_DATE DATE);

 CREATE OR REPLACE TRIGGER trg_check_dates
   BEFORE INSERT OR UPDATE ON table1
   FOR EACH ROW
 BEGIN
   :new.REGISTER_DATE := SYSDATE;
 END;

 ALTER TABLE Table1
 ADD (CONSTRAINT GT_Table1_CloseDate
 CHECK (CloseDate > REGISTER_DATE),
 CONSTRAINT LT_Table1_CloseDate
 CHECK (CloseDate <= REGISTER_DATE + 365)),
 CONSTRAINT GT_Table1_StartDate
 CHECK (StartDate > (CloseDate + (REGISTER_DATE + 730))));

ALTER TABLE dbo.MembershipInfo
ADD CONSTRAINT no_future_date_allowed
CHECK (Joined < CURRENT_TIMESTAMP)

ALTER TABLE Table_Name
ADD CONSTRAINT no_future_date_allowed
CHECK (Column_Date < DATEADD(day,DATEDIFF(day,'20000101',CURRENT_TIMESTAMP)+1,'20000101'))

ALTER TABLE dbo.MembershipInfo
ADD CONSTRAINT no_future_date_allowed
CHECK (Joined < CURRENT_TIMESTAMP)

SQL Query to Check if Date is Greater Than Today in SQL

SELECT GETDATE();        

CREATE DATABASE geeks;

USE geeks;

CREATE TABLE geeksforgeeks(
NAME VARCHAR(20),
Ordered DATE,
Deliver DATE);

INSERT  INTO geeksforgeeks VALUES
 ('ROMY', '2021-01-16', '2021-03-12'),
('AVINAV', '2021-11-12', '2021-12-12'),
 ('PUSHKAR', '2021-06-23', '2021-10-13');

SELECT * FROM geeksforgeeks;

SELECT * FROM geeksforgeeks WHERE Deliver > GETDATE();

SELECT * FROM geeksforgeeks WHERE Ordered > GETDATE();

Sql server check end date is greater than start date

WHERE (enddate IS NOT NULL AND startdate IS NOT NULL AND enddate > startdate)

ALTER TABLE dbo.yourtable ADD CONSTRAINT CK_yourtable_dates
CHECK (ISNULL(startd, SYSDATETIME) < ISNULL (endd, SYSDATETIME))

Alter table dbo.your_table ADD CONSTRAINT CK_Start_Date_before_End_Date
Check (Start_Date is null OR End_Date is null OR Start_Date < End_Date)

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