can we implement innerjoin in the following sql query - sql-server

Question

These are my tables:
CREATE TABLE forgerock (id INT, [date] DATETIME, empcode INT,[file] VARCHAR);
INSERT INTO forgerock
VALUES
(1, '2015-12-31 01:20:02', 56, 'abc1'),
(2, '2016-01-01 01:20:02', 58, 'abc2'),
(3, '2016-01-02 01:20:02', 46, 'abc3'),
(4, '2016-01-03 01:20:02', 16, 'abc4'),
(5, '2016-01-04 01:20:02', 36, 'abc5');
CREATE TABLE forge (empcode INT, [user_name] VARCHAR);
INSERT INTO forge
VALUES
(56, 'ram'),
(58, 'ram1'),
(46, 'ram2'),
(16, 'ram3'),
(36, 'ram4');
I am trying to print the file name and user_name from the tables with respect to current date and the day before the current date.
I tried the query:
ResultSet resultset = statement.executeQuery("select file from forgerock where '"+date+"' >= CURRENT_DATE('"+date+"', INTERVAL 1 DAY);") ;
but I got the exception:
Incorrect syntax near the keyword 'CURRENT_DATE'.

Answer 1

IF OBJECT_ID('dbo.forgerock', 'U') IS NOT NULL
DROP TABLE dbo.forgerock
CREATE TABLE dbo.forgerock (id INT PRIMARY KEY, [date] DATETIME, empcode INT,[file] VARCHAR(10));
INSERT INTO dbo.forgerock
VALUES
(1, '2015-12-31 01:20:02', 56, 'abc1'),
(2, '2016-01-01 01:20:02', 58, 'abc2'),
(3, '2016-01-02 01:20:02', 46, 'abc3'),
(4, '2016-01-03 01:20:02', 16, 'abc4'),
(5, '2016-01-04 01:20:02', 36, 'abc5');
IF OBJECT_ID('dbo.forge', 'U') IS NOT NULL
DROP TABLE dbo.forge
CREATE TABLE dbo.forge (empcode INT PRIMARY KEY, [user_name] VARCHAR(10));
INSERT INTO dbo.forge
VALUES (56, 'ram'),(58, 'ram1'),(46, 'ram2'),(16, 'ram3'),(36, 'ram4')
DECLARE #dt DATETIME = FLOOR(CAST(GETDATE() AS FLOAT))
SELECT *
FROM dbo.forge
WHERE empcode IN (
SELECT f.empcode
FROM dbo.forgerock f
WHERE f.[date] BETWEEN DATEADD(DAY, -1, #dt) AND #dt
)
output -
empcode user_name
----------- ----------
16 ram3

Answer 2

SELECT fr.file, f.user_name
FROM forgerock fr inner join forge f on fr.empcode = f.empcode
WHERE fr.date >= DATE_ADD(NOW(), INTERVAL -1 DAY)

Answer 3

You can use datediff to get the difference between two dates.
Try this :
ResultSet resultset = statement.executeQuery("select file from forgerock where DATEDIFF(day, GETDATE(), '" + date + "') >= 1") ;
To test the query use this one :
SELECT * FROM forgerock WHERE DATEDIFF(day, GETDATE(), #date) >= 1;
Just replace the #date with the value you want, for example '2016-01-02'

Answer 4

Use this filter:
SELECT [file]
FROM forgerock
WHERE [date] >= DATEADD(DAY, DATEDIFF(DAY,0,GETDATE()-1),0)
The DATEADD expression above will always return 12:00am yesterday morning, allowing your query to only return records from yesterday or today.
Bonus Tip: avoid using reserved keywords (such as file and date) as column or table names.

Answer 5

Since am using ms sql the code should be the following way
SELECT fr.file, f.user_name FROM forgerock fr inner join forge f on fr.empcode = f.empcodewhere [date] >= DATEADD(DAY, DATEDIFF(DAY,0,GETDATE()-1),0)
which will result in printing the two tables file from forgerock and user_name from forge

Answer 6

You have to try following query:-
SELECT fr.file, f.user_name
FROM forgerock fr inner join forge f on fr.empcode = f.empcode
AND `date' >= (DATE_ADD(`date`, INTERVAL 1 day))