DBCC--LOG

DBCC LOG
To retrieve the transaction log for a given database.
对应日志文件较大的数据库，慎用该命令
Uasge：
DBCC LOG(<dbid|dbname>,<formatid>)

formatid:
0: Return only the minimum of information for each operation -- the operation, its context and the transaction ID. (Default)
1: As 0, but also retrieve any flags and the log record length.
2: As 1, but also retrieve the object name, index name, page ID and slot ID.
3: Full informational dump of each operation.
4: As 3 but includes a hex dump of the current transaction log row.

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dbcc log [ (@dbid, @objid, @pagenum, @rownum, @records, @type [, @printopt]) ]

dbcc log (5, 0, 0, 0, -1, 0, 1) // Show the last begin transaction record in the log

Parameters:
@dbid Database ID
@objid Object ID
A negative value indicates that @pagenum & @rownum represent a row in the log to use as a starting point in the scan of the log.
A value of zero indicates that log records for changes to @pagenum will be included in the commands output.
A positive value followed by a non-zero value for @pagenum indicates that @pagenum and @rownum represent a transaction ID. Log records for that transaction will be included in the output.
A positive value followed by zero values for @pagenum and @rownum indicates an object ID. Log records for changes to that object will be included in the output.
@pagenum page number
@rownum row number in the log
Together with @pagenum, this is either a starting point in a scan of the log or a transaction id.
@records number of records to examine. If positive, the first
@type 
@printopt

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使用fn_dblog或sys.fn_dump_dblog来查看日志

SELECT * FROM sys.fn_dblog(@StartingLSN, @EndingLSN)

@StartingLSN和@EndingLSN可以为null