query

Creating a Stored ProcedureTable name and comparison field a stored procedure that can be used as a parameterCreate PROCEDURE Sp_getteacherinfo@TblName nvarchar (30),--table name@CmpStr nvarchar (30),--value to participate in the comparison@TblAtr

Explain shows how MySQL uses indexes to process SELECT statements and join tables. can help you choose better indexes and write more optimized query statements.How to: Add explain before the SELECT statement. such as EXPLAIN SELECT * from ' users '

MySQL is easy to learn and easy to use, with a wealth of technical documentation, these two factors make it widely used. However, with the rapid development of MySQL, even a MySQL veteran will sometimes marvel at the unexpected features of the

In MySQL, databases and tables correspond to directories and files in those directories. Thus, the sensitivity of the operating system determines the case sensitivity of database and table naming. This means that database and table names are case

First, everyone to download a copy of the dvbbs.php beta1 code, unpack the PHP code First, find out your MySQL manual, if there is no manual then directly to see the following example operation! MySQL full-text search, sql writing: MATCH (Col1,col2

It is useful to query all records for this quarter based on the current date. Here are two SQL statements for access quarterly query records for your reference. 1, querying all records for the current quarterSELECT * FROM news where DATEPART (' Q ',

When the database server is established, the first thing we need to do is not to consider what MySQL-enabled programs are running on this database-supporting server, but how to recover to the last normal state after the database has been compromised,

server|sqlserver| Stored Procedures | paging /*--displays the specified table using a paging program implemented by the stored procedure, view, page X of query results for the primary key or identity column in the table, fetch the query directly

The regular expression attribute in Oracle Database 10g is a powerful tool for working with text data A new feature of Oracle database 10g greatly improves your ability to search for and process character data. This feature is a formal expression,

Standardization | design | data | database | Database design           relational database design is the process of organizing and structuring data. The core problem is the design of the relational model. A relational model is a mathematical model

Stored Procedures | optimizing First, preface: After a period of storage process development, write down some of the development of the summary and experience to share with you, hope for everyone's benefit, mainly for Sybase and SQL Server database,

Skills | design | data | Database in the design of dynamic website, the importance of database design is self-evident. If the design is improper, the query is very difficult, the performance of the program will be affected. 　　Whether you're using

Notes SELECT statement The SELECT statement queries the data from the database by the specified criteria, including the following clauses: SELECT clause FROM clause WHERE clause Group BY clause HAVING clause ORDER BY clause The following

                                sql*plus Command usage            Oracle's Sql*plus is a client tool that interacts with Oracle. In Sql*plus, you can run the Sql*plus command and the Sql*plus statement.     Our usual DML, DDL, DCL statements are sql*

People tend to get into a misunderstanding when they use SQL, it is too focused on whether the resulting results are correct, ignoring the possible performance differences between different implementations, which are particularly evident in large or

server| Security Turn from: http://www.sqlsecurity.com 1. Confirm that you have installed the latest patches for nt/2000 and SQL Server, needless to say everyone should have been installed, but I think it is best to remind you here. 2. Evaluate

Excel|server /* Stored Procedure name: Exporting data to Excel Feature Description: Export data to Excel EXEC exporttoexcel @server = '. ', @uname = ' sa ', @pwd = ', @QueryText = ' SELECT * from Dldata. BBBBBB ', @filename = ' D:\ImportToExcel.xls

server| Performance 1, in the program, to ensure that in the implementation of the function of the foundation, minimizing the number of accesses to the database, minimizing the number of accesses to the table by searching the parameters, minimising

server| Create | view | index A view is also called a virtual table, because the result set returned by the view has a generic format similar to a table composed of columns and rows, and the view is referenced in SQL statements in the same way as a

Server 1.1. SQL Server development process SQL Server is a relational database management system for Microsoft Company, but it has to start with Sybase in terms of its history. SQL Server was developed from the late the 1980s, the earliest