Arun Kumar

Arun Kumar has over 8 years' extensive working experience in database query development, design, supporting many different versions of MS-SQL. He has worked to develop efficient reports, index optimization for complex queries, and has finance and operation domain experience. He has also worked with SPLUNK and enjoys training technical and non-technical colleagues.
  • Interests: Database developer and designing

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Blog Post

Find Most executed queries

SELECT TOP 50
QueryState.execution_count
,OBJECT_NAME(objectid)
,query_text = SUBSTRING(
qt.text,
QueryState.statement_start_offset/2,
(CASE WHEN QueryState.statement_end_offset = -1
THEN len(convert(nvarchar(max), qt.text)) * 2
ELSE QueryState.statement_end_offset
END - QueryState.statement_start_offset)/2)
,qt.dbid
,dbname = db_name(qt.dbid)
,qt.objectid
FROM sys.dm_exec_query_stats QueryState
CROSS APPLY sys.dm_exec_sql_text(QueryState.sql_handle) as qt
ORDER BY...

2018-09-18

2,111 reads

Blog Post

Get all queries running against any specific table

/*Get list of all queries hitting any specific tables*/SELECT DISTINCT TOP 100ProcedureName = OBJECT_SCHEMA_NAME(sqlTxt.objectid) + '.' + OBJECT_NAME(sqlTxt.objectid),SQLStatement = SUBSTRING(sqlTxt.Text,(QueryState.statement_start_offset/2)+1,CASE QueryState.statement_end_offsetWHEN -1 THEN DATALENGTH(sqlTxt.text)ELSE QueryState.statement_end_offsetEND...

2018-09-18

3,887 reads

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Question of the Day

Adding new column with DEFAULT II

Which number did the two COUNT(*) return: 

DROP TABLE IF EXISTS #tmp
CREATE TABLE #tmp (id INT NOT NULL)

INSERT INTO #tmp (id) 
SELECT gs.value
  FROM GENERATE_SERIES(1, 5) AS gs

ALTER TABLE #tmp ADD my_value INT NOT NULL CONSTRAINT df_tmp_my_value DEFAULT 1

SELECT COUNT(*)  FROM #tmp AS t WHERE my_value = 1

ALTER TABLE #tmp DROP CONSTRAINT df_tmp_my_value

ALTER TABLE #tmp ADD CONSTRAINT df_tmp_my_value DEFAULT 2 FOR my_value

SELECT COUNT(*)  FROM #tmp AS t WHERE my_value = 1

See possible answers