t sql fundamentals

---- Set a non-primary key to clustered index [Step 4] to: http://king123654789.iteye.com/blog/1169191 1. View All indexes. Clustered indexes are created on the primary key by default.Sp_helpindex person 2. -- delete the primary key constraint and remove the index constraint on the primary key queried in [1], for example, PK _ person _ 117F9D94. Remove the primary key constraint from the primary key field. This field is not the primary key.Alter table person drop constraint PK _ person _ 117F9

Artificial Intelligence automatic SQL optimization tools-SQLTuning for SQL Server, SQL-sqltuning In response to this situation, the artificial intelligence automatic SQL optimization tool came into being. Now I will introduce this tool: SQLTuning for SQL Server. 1.

First of all, the so-called SQL dynamic and static, refers to when SQL statements are compiled and executed, both are used in SQL embedded programming, which is referred to as embedded refers to the SQL statement embedded in the high-level language, rather than the type of microcontroller embedded programming.In a high

Convert a string in the format of "yyyy-mm-dd" to Java. SQL. Date: Simpledateformat bartdateformat = new simpledateformat ("yyyy-mm-dd "); String datestringtoparse = "2007-7-12 "; Try { Java. util. Date = bartdateformat. parse (datestringtoparse ); Java. SQL. Date sqldate = new java. SQL. date (date. gettime ());System. Out. println (sqldate. gettime ()); }

After so many years of mixing in the forum, we have seen an obvious trend: more and more netizens are using VFP and SQL server for the system. Many people are concerned about how to operate or manage SQL Server from VFP. You can use views, SPT, or ADO to perform data operations on SQL Server. However, to manage the server itself, it seems that only SPT can be use

Red Gate Series iii SQL Server development tool SQL prompt 5.3.4.1 edition T-SQL smart sensing analyzer complete cracking + use tutorial Red Gate SeriesArticle: SQL compare 10.2.0.1337 edition, one of the red gate series, database comparison tool, complete cracking + tutorial Red Gate Series ii

SQL Server complex SQL logic implementation, SQL Server SQL Logic I. Problems For example, if you already have data in tables a and B, how can you convert it to Table c through SQL statements? Table a is a table that has the same UserName and summarizes Salary data in descen

look for poor performance SQL StatementTo optimize SQL statements with poor performance in the database, first we need to find the poor performance SQL statements.The following describes if you use the tool SQL Tuning Expert Pro for Oracle to find SQL from the SGA and awr.SQ

This paper describes the simple implementation of SQL anti-injection method in PHP. Share to everyone for your reference, as follows: There is not much filtering here, mainly for PHP and MySQL combination. General anti-injection, as long as the use of PHP addslashes function is possible. Here's a copy of the code: PHP Code: $_post = Sql_injection ($_post); $_get = Sql_injection ($_get); function Sql_injection ($content) {if (!get_magic_quotes_ GPC (

SSMA migrating local my SQL to local SQL Server and Windows Azure SQL DatabaaseSpeaking of databases, many people will think of my SQL, SQL Server and Oracle, and so on, and very people prefer my SQL, because my

a view DROP VIEW [dbo].[View name] GO --------------- --determine if the name of the function to be created exists IF exists(SELECT * fromDbo.sysobjectsWHEREId= object_id(N'[dbo]. [function name]') andXtypeinch(N'FN'N'IF'N'TF')) --Delete a function DROP FUNCTION [dbo].[Name of function] GO IF col_length('Table name','Column Name') is NULL PRINT 'does not exist' SELECT 1 fromsysobjectsWHEREIdinch(SELECTId fromsyscolumnsWHEREName='Column Name') andName='Table name' Reprint: http://www.bitscn.c

MS SQL Server Query optimization methodThere are many reasons for the slow speed of queries, which are common1, no indexes, or no indexes (this is the most common problem with query slowness, is the flaw in programming)2, I/o throughput is small, creating a bottleneck effect.3, no computed columns are created causing the query to be not optimized.4, Low memory5, network speed is slow6, query out the amount of data is too large (you can use multiple qu

In addition to providing powerful management tools Enterprise Manager, reliable security management and database backup and recovery, and built-in replication components, SQL Server includes a number of other tools and reassuring features. In this chapter we'll introduce SQL Mail, SQL Server Profiler, Query Analyzer, and hopefully readers will be able to use them