sql bolt

As a performance tool of the Microsoft SQL Server database series, SQL Server Profiler can track the running status of databases in real time and find slow queries or deadlocked SQL statements, to optimize the system. This article describes how to use Silverlight to monitor SQL Server Profiler in real time (the databas

PL/SQL program control structure and change data and manage transactions in PL/SQL, plsql1. condition Control A. IF condition branch Syntax: If (condition 1) then Statement; Elsif (condition 2) then Statement; Elsif (Condition 3) then Statement; Else Statement; End if; B. case condition branch: equivalent comparison, condition comparison, and case expression A. Equivalent comparison Syntax: CASE condition j

Author: no_miss QQ: 34813284 Time: 2006.11.07 23:30:00 Environment: win2003 + mssql2005 Recently, I have always wanted to understand and understand MSSQL, but I have never thought about it and have no time to write it. At night I wrote an execution plan to explore MSSQL, this article describes the execution plan, but not limited to the execution plan. There are a lot of articles on SQL Optimization on the Internet. To be honest, I have been looking f

Many people tend to fall into a misunderstanding when using SQL, that is, they are too concerned about whether the obtained results are correct, while ignoring the possible performance differences between different implementation methods, this performance difference is particularly evident in large or complex database environments (such as online transaction processing OLTP or decision support system DSS. In my work practice, I found that poor

Label:Description: This document is translated/collated in Hive Official document https://cwiki.apache.org/confluence/display/Hive/SQL+Standard+Based+Hive+Authorization# Sqlstandardbasedhiveauthorization-objectprivilegecommands.status of authorization prior to Hive version 0.13 Hive Default Authorization (Authorization (Legacy Mode))It is not designed to prevent malicious users from accessing (manipulating) unauthorized data, helping users avoid une

Original: 17th--Configure SQL Server (1)--Configure more processors for SQL ServerObjective:SQL Server provides a system stored procedure, sp_configure, that can help you manage the configuration at the instance level. Microsoft recommends using the default configuration, but depending on the server, the different load systems, and your usage, changing the configuration may benefit your performance. In 32-b

Original: [SQL Server] executes the. SQL script in the folder at onceThe initial database, we developers will prepare a lot of. SQL scripts to create tables, view even initial data, how to execute the *.sql in the folder at one time or specify several. sql scripts?To save a

both Oracle and SQL Server follow the SQL-92 standard: http://owen.sj.ca.us/rkowen/howto/sql92F.html , but there are some differences, the difference is as follows: Oracle table name, field name, stored procedure name, variable name cannot exceed 30 string lengths. The top syntax is not supported in Oracle. Use Whererownum The use of cursors in Oracle is quite different from

................................................................................................ END LOOP; D. Nesting loops and Labels: defining labels: 3. Sequential controlA.goto statement: Used to jump to a specified The disadvantage is that it increases the complexity of the program and reduces readability, so Oracle does not recommend using it for the day. B. NULL statement: Empty statement, do not have any actual effect, usually occupy position with 4. Exception Handling A. There are two

What should I do if SQL Server executes dynamic SQL statements? The following describes the two correct ways for SQL Server to execute dynamic SQL. We hope that you can have a better understanding of SQL Server to execute dynamic SQL