Turn from: Nested transactions in SQL Server use--transaction count indicates a mismatch between the number of BEGIN and COMMIT statements--The underlying problemProblem:1. System.Data.SqlClient.SqlException (0x80131904): The transaction count after
Compare the impact of a single COMMIT and multiple COMMIT on the waste of log space while changing the data volume.
The LGWR process writes online logs in sequence and does not skip in the middle, and the LGWR process does not write twice in the
Start transaction,COMMIT, AndROLLBACKSyntax
From: http://dev.mysql.com/doc/refman/5.0/en/commit.html
Of course, the article noted from MySQL, but MySQL, SQL Server, Oracle start tracmsaction, commit, and rollback syntax are no problem in DML.
I hope
Oracle Block scn/commit scn/cleanout scn description 1. description: The cache header part of the Block records a block scn, which is the timestamp of the last change of the current Block. To be exact, this update does not refer to the latest update
For more information about bugs fixed in SQL Server 2000 Service Pack 4, click the following article number to view the article in the Microsoft Knowledge Base:314128 FIX: When an RPC call is performed, Access with conflicting values includes an
Distributed transactions, like local transactions, contain atomicity (atomicity), consistency (consistency), isolation (isolation), and persistence (durability). Two-stage commit is an important method to ensure atomicity in distributed transaction.
35. use SQL query analyzer and SQL profilerUse SQL query AnalyzerUse SQL profilerOptimize T-SQL statementSummaryIn this chapter, we will continue with the description of the pre-stored procedures in Chapter 21st. This chapter describes how to use
The LGWR process writes online logs in sequence and does not skip in the middle, and the LGWR process does not write twice in the same log. Even if the logs written at a time occupy only a few bytes, they will not be used again next time, this
Insert statement plus/* + APPEND */impact analysis on the system of a single commit in a loop, insertappend1./* + APPEND */usage of the prompt
/* + APPEND */indicates that an INSERT statement exclusive hint is used to increase the insert speed and
Start transaction, commit and rollback syntaxStart Transaction | Begin [Work]commit [Work] [and [No] chain] [[No] release]rollback [work] [and [No] chain] [[No] release]set autocommit = { 0 | The 1}start transaction or BEGIN statement can begin a
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