SQL Use ful queries

Find Column in Database
SELECT t.name AS table_name,
SCHEMA_NAME(schema_id) AS schema_name,
c.name AS column_name
FROM sys.tables AS t
INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID
WHERE c.name LIKE '%EmployeeID%'
ORDER BY schema_name, table_name;

Find all connections(active)

SELECT DB_NAME(dbid) as "Database", COUNT(dbid) as "Number Of Open Connections",
loginame as LoginName
FROM sys.sysprocesses
WHERE dbid > 0
GROUP BY dbid, loginame

OR

SELECT
    DB_NAME(dbid) as DBName,
    COUNT(dbid) as NumberOfConnections,
    loginame as LoginName
FROM sys.sysprocesses
WHERE
    dbid > 0
GROUP BY
    dbid, loginame
;

Find Replication Process/Status
SELECT
(CASE
    WHEN mdh.runstatus =  '1' THEN 'Start - '+cast(mdh.runstatus as varchar)
    WHEN mdh.runstatus =  '2' THEN 'Succeed - '+cast(mdh.runstatus as varchar)
    WHEN mdh.runstatus =  '3' THEN 'InProgress - '+cast(mdh.runstatus as varchar)
    WHEN mdh.runstatus =  '4' THEN 'Idle - '+cast(mdh.runstatus as varchar)
    WHEN mdh.runstatus =  '5' THEN 'Retry - '+cast(mdh.runstatus as varchar)
    WHEN mdh.runstatus =  '6' THEN 'Fail - '+cast(mdh.runstatus as varchar)
    ELSE CAST(mdh.runstatus AS VARCHAR)
END) [Run Status],
mda.subscriber_db [Subscriber DB],
mda.publication [PUB Name],
right(left(mda.name,LEN(mda.name)-(len(mda.id)+1)), LEN(left(mda.name,LEN(mda.name)-(len(mda.id)+1)))-(10+len(mda.publisher_db)+(case when mda.publisher_db='ALL' then 1 else LEN(mda.publication)+2 end))) [SUBSCRIBER],
CONVERT(VARCHAR(25),mdh.[time]) [LastSynchronized],
und.UndelivCmdsInDistDB [UndistCom],
mdh.comments [Comments],
'select * from Distributor.dbo.msrepl_errors (nolock) where id = ' + CAST(mdh.error_id AS VARCHAR(8)) [Query More Info],
mdh.xact_seqno [SEQ_NO],
(CASE
    WHEN mda.subscription_type =  '0' THEN 'Push'
    WHEN mda.subscription_type =  '1' THEN 'Pull'
    WHEN mda.subscription_type =  '2' THEN 'Anonymous'
    ELSE CAST(mda.subscription_type AS VARCHAR)
END) [SUB Type],

mda.publisher_db+' - '+CAST(mda.publisher_database_id as varchar) [Publisher DB],
mda.name [Pub - DB - Publication - SUB - AgentID]
FROM Distributor.dbo.MSdistribution_agents mda
LEFT JOIN Distributor.dbo.MSdistribution_history mdh ON mdh.agent_id = mda.id
JOIN
    (SELECT s.agent_id, MaxAgentValue.[time], SUM(CASE WHEN xact_seqno > MaxAgentValue.maxseq THEN 1 ELSE 0 END) AS UndelivCmdsInDistDB
    FROM Distributor.dbo.MSrepl_commands t (NOLOCK)
    JOIN Distributor.dbo.MSsubscriptions AS s (NOLOCK) ON (t.article_id = s.article_id AND t.publisher_database_id=s.publisher_database_id )
    JOIN
        (SELECT hist.agent_id, MAX(hist.[time]) AS [time], h.maxseq
        FROM Distributor.dbo.MSdistribution_history hist (NOLOCK)
        JOIN (SELECT agent_id,ISNULL(MAX(xact_seqno),0x0) AS maxseq
        FROM Distributor.dbo.MSdistribution_history (NOLOCK)
        GROUP BY agent_id) AS h
        ON (hist.agent_id=h.agent_id AND h.maxseq=hist.xact_seqno)
        GROUP BY hist.agent_id, h.maxseq
        ) AS MaxAgentValue
    ON MaxAgentValue.agent_id = s.agent_id
    GROUP BY s.agent_id, MaxAgentValue.[time]
    ) und
ON mda.id = und.agent_id AND und.[time] = mdh.[time]
where mda.subscriber_db<>'virtual' -- created when your publication has the immediate_sync property set to true. This property dictates whether snapshot is available all the time for new subscriptions to be initialized. This affects the cleanup behavior of transactional replication. If this property is set to true, the transactions will be retained for max retention period instead of it getting cleaned up as soon as all the subscriptions got the change.
--and mdh.runstatus='6' --Fail
--and mdh.runstatus<>'2' --Succeed

order by mdh.[time]


OR

/*Replication Process */

SELECT
(CASE
    WHEN mdh.runstatus =  '1' THEN 'Start - '+cast(mdh.runstatus as varchar)
    WHEN mdh.runstatus =  '2' THEN 'Succeed - '+cast(mdh.runstatus as varchar)
    WHEN mdh.runstatus =  '3' THEN 'InProgress - '+cast(mdh.runstatus as varchar)
    WHEN mdh.runstatus =  '4' THEN 'Idle - '+cast(mdh.runstatus as varchar)
    WHEN mdh.runstatus =  '5' THEN 'Retry - '+cast(mdh.runstatus as varchar)
    WHEN mdh.runstatus =  '6' THEN 'Fail - '+cast(mdh.runstatus as varchar)
    ELSE CAST(mdh.runstatus AS VARCHAR)
END) [Run Status],
mda.subscriber_db [Subscriber DB],
mda.publication [PUB Name],
right(left(mda.name,LEN(mda.name)-(len(mda.id)+1)), LEN(left(mda.name,LEN(mda.name)-(len(mda.id)+1)))-(10+len(mda.publisher_db)+(case when mda.publisher_db='ALL' then 1 else LEN(mda.publication)+2 end))) [SUBSCRIBER],
CONVERT(VARCHAR(25),mdh.[time]) [LastSynchronized],
und.UndelivCmdsInDistDB [UndistCom],
mdh.comments [Comments],
'select * from Distributor.dbo.msrepl_errors (nolock) where id = ' + CAST(mdh.error_id AS VARCHAR(8)) [Query More Info],
mdh.xact_seqno [SEQ_NO],
(CASE
    WHEN mda.subscription_type =  '0' THEN 'Push'
    WHEN mda.subscription_type =  '1' THEN 'Pull'
    WHEN mda.subscription_type =  '2' THEN 'Anonymous'
    ELSE CAST(mda.subscription_type AS VARCHAR)
END) [SUB Type],

mda.publisher_db+' - '+CAST(mda.publisher_database_id as varchar) [Publisher DB],
mda.name [Pub - DB - Publication - SUB - AgentID]
FROM Distributor.dbo.MSdistribution_agents mda
LEFT JOIN Distributor.dbo.MSdistribution_history mdh ON mdh.agent_id = mda.id
JOIN
    (SELECT s.agent_id, MaxAgentValue.[time], SUM(CASE WHEN xact_seqno > MaxAgentValue.maxseq THEN 1 ELSE 0 END) AS UndelivCmdsInDistDB
    FROM Distributor.dbo.MSrepl_commands t (NOLOCK)
    JOIN Distributor.dbo.MSsubscriptions AS s (NOLOCK) ON (t.article_id = s.article_id AND t.publisher_database_id=s.publisher_database_id )
    JOIN
        (SELECT hist.agent_id, MAX(hist.[time]) AS [time], h.maxseq
        FROM Distributor.dbo.MSdistribution_history hist (NOLOCK)
        JOIN (SELECT agent_id,ISNULL(MAX(xact_seqno),0x0) AS maxseq
        FROM Distributor.dbo.MSdistribution_history (NOLOCK)
        GROUP BY agent_id) AS h
        ON (hist.agent_id=h.agent_id AND h.maxseq=hist.xact_seqno)
        GROUP BY hist.agent_id, h.maxseq
        ) AS MaxAgentValue
    ON MaxAgentValue.agent_id = s.agent_id
    GROUP BY s.agent_id, MaxAgentValue.[time]
    ) und
ON mda.id = und.agent_id AND und.[time] = mdh.[time]
where mda.subscriber_db<>'virtual' -- created when your publication has the immediate_sync property set to true. This property dictates whether snapshot is available all the time for new subscriptions to be initialized. This affects the cleanup behavior of transactional replication. If this property is set to true, the transactions will be retained for max retention period instead of it getting cleaned up as soon as all the subscriptions got the change.
--and mdh.runstatus='6' --Fail
--and mdh.runstatus<>'2' --Succeed
order by mdh.[time]

/* Error QUery*/

select * from Distributor.dbo.msrepl_errors (nolock) where id = 0

List All Databases
EXEC sp_helpdb