sql insert if

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

MySQL Bulk SQL Insert performance optimizationsPosted by Kiki TitaniumOn December 7, 2012 For some systems with large data volume, the problem of database is not only inefficient, but also the data storage time is long. Especially like a reporting

Category: LinuxAn overview of the INSERT processing processFirst, let's take a quick look at the processing steps when inserting a row. Each of these steps has the potential for optimization, which we'll discuss in a later step.Prepares the

Copy Code code as follows: /* SQL based on Chinese characters to get full spell (some words have not been added up, please add yourself, tu Note) Generate all temporary tables for pronunciation Get pronunciation according to

For some systems with large data volume, the problem of database is not only inefficient, but also the data storage time is long. Especially like a reporting system, the time spent on data import every day can be as long as a few hours or more than 1

This article uses SQL Server 2005 Preparations:I need a user table. This table has several fields and a self-increasing number ID. The table structure is as follows: This is a much simpler user table than in real-world applications, and userid

13. T-SQL and SQL query AnalyzerWhat is SQL?What is T-SQL?Introduce new features of T-SQLHow to Use T-SQLSummaryIn this chapter, we will introduce some basic concepts about the Structured Query Language and transact-SQL and their differences. This

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

If mysql processes an index, it is updated. If there is no index, it is inserted (multiple columns of unique indexes). If there is no index, It is very common to insert the index, there are many similar articles on the Internet. Today I will talk

When the phone field is set to unique in mysql, insert an SQL statement with the same phone number as if a record is successfully inserted, instead of returning an insert error! What should I do? {code...} mysql sets the phone field to unique and