Retrieve a data from a partition in SQL Servertable - mysql

Question

I'm new to SQL Server partitioning. I have tried a some of the tutorials and finally I got this based on that created a partition but the problem is that I can't retrieve the data's based on partition like in MYSQL query
SELECT * FROM TABLE_NAME PARTITION(partitionId)
and also tried this query in SQL Server
SELECT $PARTITION.partition_function (partition_function_id)
EDIT:
The picture shows the data in table I have created partition based on Date, I like to retrieve data based on partition name, which is if partition name is 20170203 I am excepting results on that date.

Answer 1

select * from TABLE_NAME
where $partition.fpartfunction(date) = 1
This returns all the data in partition 1.
If you want to retrieve it from the date you can do as below,
CREATE PARTITION FUNCTION PF_Date(date) AS RANGE LEFT FOR VALUES('2017-01-01','2018-01-01');
--first partition
SELECT *
FROM schema.table_name
WHERE key_column <= '2017-01-01';
--second partition
SELECT *
FROM schema.table_name
WHERE key_column > '2017-01-01' AND key_column <= '2018-01-01';
--last partition
SELECT *
FROM schema.table_name
WHERE key_column > '2018-01-01';

Answer 2

I hope this may work for your need:
CREATE PROCEDURE USP_GetRowsWithinPartition (#InputDate DATE)
AS
BEGIN
DECLARE #TV TABLE
(StartDate DATE,
EndDate DATE
)
INSERT INTO #TV (StartDate, EndDate)
SELECT TOP 1
CAST((CASE
WHEN (DATEPART(MONTH, #InputDate)) = 7 AND (DATEPART(DAY, #InputDate)) > 2
THEN DATEADD(YEAR, -1, CONVERT(DATE, prv.Value, 116))
WHEN (DATEPART(MONTH, #InputDate)) > 7 AND (DATEPART(DAY, #InputDate)) >= 1
THEN DATEADD(YEAR, -1, CONVERT(DATE, prv.Value, 116))
ELSE prv.Value
END) AS DATE) AS StartDate,
CAST((CASE
WHEN (DATEPART(MONTH, #InputDate)) = 7 AND (DATEPART(DAY, #InputDate)) > 2
THEN prv.Value
WHEN (DATEPART(MONTH, #InputDate)) > 7 AND (DATEPART(DAY, #InputDate)) >= 1
THEN prv.Value
ELSE DATEADD(YEAR, 1, CONVERT(DATE, prv.Value, 116))
END ) AS DATE) AS EndDate
FROM sys.partition_functions pf
INNER JOIN sys.partition_schemes AS ps ON ps.function_id = pf.function_id
INNER JOIN sys.destination_data_spaces AS dds ON dds.partition_scheme_id = ps.data_space_id
INNER JOIN sys.dm_db_partition_stats pstats ON pstats.partition_number = dds.destination_id
INNER JOIN sys.partitions p ON p.partition_id = pstats.partition_id
INNER JOIN sys.data_spaces AS ds ON dds.data_space_id = ds.data_space_id
INNER JOIN sys.partition_range_values AS prv ON pf.function_id = prv.function_id
WHERE pstats.object_id = OBJECT_ID('YourTable')
GROUP BY prv.boundary_id, prv.value
ORDER BY ABS(DATEDIFF(DAY, #InputDate, Convert(DATE, value, 116)))
SELECT yt.* FROM YourTable yt
INNER JOIN #TV t ON yt.DateColumn>=t.StartDate AND yt.DateColumn < t.EndDate
END
EXEC USP_GetRowsWithinPartition '2015-08-01'

Answer 3

(MySQL)
There is virtually no use for accessing a specific PARTITION. You should let the WHERE clause pick which partition(s) to use.
Furthermore, there are very few uses for partitioning. I recommend that you ignore that feature until you have a non-trivial amount of experience under your belt.
Any, to answer your question... Yes, this should work:
SELECT * FROM TABLE_NAME PARTITION(partitionId);
But that was not available until 5.6.
The partitionid may need to be quoted, especially if it is a number. For further research, please provide SHOW CREATE TABLE.