distributed-database-middleware/umn/source/sql_syntax/functions.rst

original_name

ddm_03_0063.html

Functions

Supported Functions

Table 1 Operator functions

Expression	Example
IN	SELECT * FROM Products WHERE vendor_id IN ( 'V000001', 'V000010' ) ORDER BY product_price
NOT IN	SELECT product_id, product_name FROM Products WHERE vendor_id NOT IN ('V000001', 'V000002') ORDER BY product_id
BETWEEN	SELECT id, product_id, product_name, product_price FROM Products WHERE id BETWEEN 000005 AND 000034 ORDER BY id
NOT...BETWEEN	SELECT product_id, product_name FROM Products WHERE NOT vendor_id BETWEEN 'V000002' and 'V000005' ORDER BY product_id
IS NULL	SELECT product_name FROM Products WHERE product_price IS NULL
IS NOT NULL	SELECT id, product_name FROM Products WHERE product_price IS NOT NULL ORDER BY id
AND	SELECT * FROM Products WHERE vendor_id = 'V000001' AND product_price <= 4000 ORDER BY product_price
OR	SELECT * FROM Products WHERE vendor_id = 'V000001' OR vendor_id = 'V000009'
NOT	SELECT product_id, product_name FROM Products WHERE NOT vendor_id = 'V000002'
LIKE	SELECT * FROM Products WHERE product_name LIKE 'NAME%' ORDER BY product_name
NOT LIKE	SELECT * FROM Products WHERE product_name NOT LIKE 'NAME%' ORDER BY product_name
CONCAT	SELECT product_id, product_name, CONCAT( product_id , '(', product_name ,')' ) AS product_test FROM Products ORDER BY product_id
	SELECT 3 * 2+5-100/50
-	SELECT 3 * 2+5-100/50
*	SELECT order_num, product_id, quantity, item_price, quantity*item_price AS expanded_price FROM OrderItems WHERE order_num BETWEEN 000009 AND 000028 ORDER BY order_num
/	SELECT 3 * 2+5-100/50
UPPER	SELECT id, product_id, UPPER(product_name) FROM Products WHERE id > 10 ORDER BY product_id
LOWER	SELECT id, product_id, LOWER(product_name) FROM Products WHERE id <= 10 ORDER BY product_id
SOUNDEX	SELECT * FROM Vendors WHERE SOUNDEX(vendor_name) = SOUNDEX('test') ORDER BY vendor_name
IFNULL	SELECT IFNULL(product_id, 0) FROM Products;

Table 2 Time and date functions

Expression	Example
DAY()	SELECT * FROM TAB_DATE WHERE DAY(date)=21 SELECT * FROM TAB_DATE WHERE date='2018-12-21' INSERT INTO TAB_DATE(id,date) VALUES(1,'2018-05-22')
MONTH()	SELECT * FROM TAB_DATE WHERE MONTH(date)=12 SELECT * FROM TAB_DATE WHERE date='2018-12-21' INSERT INTO TAB_DATE(id,date) VALUES(1,'2018-05-22')
YEAR()	SELECT * FROM TAB_DATE WHERE YEAR(date)=2018 SELECT * FROM TAB_DATE WHERE date='2018-12-21' INSERT INTO TAB_DATE(id,date) VALUES(1,'2018-05-22')

Table 3 Mathematical functions

Expression	Example
SQRT()	SELECT id, product_price, SQRT(product_price) AS price_sqrt FROM Products WHERE product_price < 4000 ORDER BY product_price
AVG()	SELECT AVG(product_price) AS avg_product FROM Products
COUNT()	SELECT COUNT(*) AS num_product FROM Products
MAX()	SELECT id, product_id, product_name, MAX(product_price) AS max_price FROM Products ORDER BY id
MIN()	SELECT id, product_id, product_name, MIN(product_price) AS min_price FROM Products ORDER BY id
SUM()	SELECT SUM(product_price) AS sum_product FROM Products

Unsupported Functions

Table 4 Function restrictions

Item	Restriction
ROW_COUNT()	Function ROW_COUNT() is not supported.