Database Administrator

Excel uses cube and excelcube Which one can give me an example of using the Cube formula in Excel? You're too lazy. How to Control Data permissions by connecting excel to cube Are your computers operating on the same network or a single

Database transaction isolation level, transaction isolation level Transaction Features: ACID Atomicity: Atomicity Consistency: Consistency Isolation: Isolation Duration: Persistence   The SQL standard defines four isolation levels for transactions: 1

Chapter 1 (4 and 5) of Solr In Action 1.1 feature Overview Finally, let's take a quick look at the main functions of Solr based on the following categories: · User Experience · Data Modeling · New Features of Solr 4 This book provides a good search

Rman backup optimization ideas, rman backup This chapter does not discuss the principles of rman backup, but only provides some ideas. 1. Select the compression algorithm of oracle11g as intermediate; 2. added the rman backup channel. The above two

Iii. List-related operations of redis, redislist=======================================Three types: list type =================================Introduction: list type and operationsList is the result of a chain table, as long as the function is push,

SQL updates multiple fields with subquery results. SQL queries table fields. Author: iamlasong Requirement: The table content needs to be changed. The changed content should be placed in a temporary table, and multiple fields in the formal table

Oracle partition index and oracle Index Partition indexes (or index partitions) are mainly used for partition tables. As the data volume continues to grow, normal heap tables need to be converted to partitioned tables. What about their indexes? The

Log_archive_dest_n and standby_archive_dest Today, I checked the materials and found that the relationship between log_archive_dest_n and standby_archive_dest is a bit vague. I will do a simple test to clarify the relationship and deepen my

10.2.0.4 to 10.2.0.5 Installation of Patch Set Release (Windows) Environment: 10.2.0.4 cluster database zlm10g (dual-node, zlm10g1, zlm10g2) System: Windows 2003 Server 64Bit Memory: 2 GB RAM Storage: ASM Objective: To upgrade the cluster database

Database transaction isolation level The main problems to be solved by database software are the conflict between "data consistency" and "Access concurrency". In theory, we have summarized several uncertainties that need to be solved to ensure data

The specific implementation code is as follows: Sqlite> SELECT datetime (1377168853, 'unixepoch', 'localtime'); + ------------------------------------------------ + | datetime (1377168853, 'unixepoch', 'localtime ') | + hour + | 18:54:13 | + hour +

Dangerous: no security vulnerability scan is performed.Consequence: vulnerabilities in the operating system and network programs are discovered by hackers, and even the database is broken.Remedy: always keep the latest security patches and regularly

select case when status='UNUSABLE' then 'alter index '||owner||'.'||index_name||' rebuild online compute statistics;' when to_number(degree)>1 then 'alter index /* '||degree ||' */'||owner||'.'||index_name||' noparallel;' end

What is local injection? Simply put, you cannot perform SQL Injection on the server because the WEB program on the server is safe and the request ("id") is strictly filtered, or restrict the input format to numbers. You can only discard the

The connection can be established in the FROM clause or WHERE clause of the SELECT statement. It is similar that it helps to distinguish the connection operation FROM the search conditions in the WHERE clause when the clause points out the

The SQL statement with parameters is executed on the database.Exec sp_executesqlEg:Exec sp_executesql n' insert into LCS_Sys_Model ([Model_GUID], [Model_Name], [Model_Desp], [Model_IsSys]) values (@ Model_GUID, @ Model_Name, @ Model_Desp, @

Automatic MSSQL SynchronizationThe following uses 117 and 75 as examples to describe: 117 release & distributor, 75 subscription ServerI. preparations:1. Create a sqlagt user on 117 & 75, which belongs to the administrators group and is used to

As we discussed in the previous tutorial, paging can be implemented in two ways: Default Page-you only need to select the Enable Paging of the Smart tag of data Web control. However, when you browse the page, although you only see a small amount

Check the Code:Copy codeThe Code is as follows:Set statistics io onSet statistics time onGoSet statistics profile onGoUse pubsSelect * from authorsWhere (au_fname like's % 'or au_fname like 'a % ')And (state like 'CA' or state like 'ut ')And (cast

Chapter 1 Check System Status 1.1 Use sar to check whether the operating system has IO Problems1.2 Focus on memory vmstat1.3 find the sessions and statements executed by Oracle with extremely large resources1.4 search for the top 10 SQL statements