17.00 - 17.05 - Example: Using MEETS - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Date and Time Functions and Expressions

Product
Advanced SQL Engine
Teradata Database
Release Number
17.00
17.05
Release Date
June 2020
Content Type
Programming Reference
Publication ID
B035-1211-170K
Language
English (United States)

Assume that in the employee table, created by the following CREATE TABLE statement, jobdur1 and jobdur2 are derived period columns.

CREATE TABLE employee (
   eid INTEGER NOT NULL, 
   name VARCHAR(100) NOT NULL,
   deptno INTEGER NOT NULL,
   jobst1 DATE NOT NULL,
   jobend1   DATE NOT NULL,
   PERIOD FOR jobdur1(jobst1, jobend1),
   jobst2 DATE NOT NULL,
   jobend2   DATE NOT NULL,
   PERIOD FOR jobdur2(jobst2, jobend2)
   ) PRIMARY INDEX(eid);
EID Name Dept No JobSt1 JobEnd1 JobSt2 JobEnd2
1 Tom 101 DATE'2001-01-01' DATE'2004-01-01' DATE'2005-01-01' DATE'2006-01-01'
2 Rick 201 DATE'2005-01-01' DATE'2006-01-01' DATE'2001-01-01' DATE'2004-01-01'
3 Joo 301 DATE'2005-01-01' DATE'2006-01-01' DATE'2006-01-01' DATE'2007-01-01'
4 Tam 401 DATE'2001-01-01' DATE'2006-01-01' DATE'2002-01-01' DATE'2004-01-01'
5 Pat 501 DATE'2005-01-01' DATE'2007-01-01' DATE'2006-01-01' DATE'2008-01-01'
6 Jack 601 DATE'2005-01-01' DATE'2007-01-01' DATE'2007-01-01' DATE'2008-01-01'
7 Yu 701 DATE'2005-01-01' DATE'2007-01-01' DATE'2004-01-01' DATE'2005-01-01'
8 Tim 801 DATE'2005-01-01' DATE'2007-01-01' DATE'2005-01-01' DATE'2007-01-01'

In the following SQL statement, MEETS is used with derived period columns of the employee table:

SELECT eid, name, deptno, jobst1, jobend1, jobst2, jobend2 
FROM employee 
WHERE jobdur1 MEETS jobdur2;

The result is:

EID Name Dept No JobSt1 JobEnd1 JobSt2 JobEnd2
3 Joo 301 DATE'2005-01-01' DATE'2006-01-01' DATE'2006-01-01' DATE'2007-01-01'
6 Jack 601 DATE'2005-01-01' DATE'2007-01-01' DATE'2007-01-01' DATE'2008-01-01'
7 Yu 701 DATE'2005-01-01' DATE'2007-01-01' DATE'2004-01-01' DATE'2005-01-01'