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1 //====================================================================往表中增加数据vote_answer为表名<br> 2 /*<br> 3 $ins_vote_answer = new voteAnswer();//往vote_answer表中插入数据<br> 4 $ins_vote_answer['id'] = 3;<br> 5 $ins_vote_answer['member_id'] = 1;<br> 6 $ins_vote_answer['vote_question_id'] = 1;<br> 7 $ins_vote_answer['vote_question_option_id'] = 1;<br> 8 $ins_vote_answer['body'] = 1;<br> 9 $ins_vote_answer['created_at'] = 1;<br>10 $ins_vote_answer['updated_at'] = 1;<br>11 $ins_vote_answer->save();<br>12 */<br>13 <br>14 //====================================================================查询数据<br>15 /*<br>16 // $id = 1;<br>17 // $member_id = 1;<br>18 // $que_voteAnswer = Doctrine::getTable('voteAnswer')->createQuery()->select('id,member_id')->where('id=?',$id)->andWhere('member_id=?',$member_id)->orderBy('id')->groupBy('id');//====查询方法一表名vote_answer<br>19 // $que_voteAnswer = Doctrine_Query::create()->select('id,member_id')->from('voteAnswer')->where('id = 2')->andWhere('member_id = 1')->orderBy('id')->groupBy('id');//====查询方法二<br>20 // $row_voteAnswer = $que_voteAnswer->fetchOne();//不管执行几次此方法只获取结果集第一条记录<br>21 // //$row_voteAnswers = $que_voteAnswer->execute();//和下面的fetchArray()方法基本等同,都需要沥遍<br>22 // //$row_voteAnswers = $que_voteAnswer->fetchArray();<br>23 // //foreach($row_voteAnswers as $row_voteAnswer){<br>24 // $this->a = $row_voteAnswer['id'];<br>25 // /

BlobdatatypesinmysqlareusedforvoringLargebinarydatalikeImagesoraudio.1) Useblobtypes (tinyblobtolongblob) Basedondatasizeneeds. 2) Storeblobsin Perplate Petooptimize Performance.3) ConsidersxterNal Storage Forel Blob Romana DatabasesizerIndimprovebackupupe

ToadduserstoMySQLfromthecommandline,loginasroot,thenuseCREATEUSER'username'@'host'IDENTIFIEDBY'password';tocreateanewuser.GrantpermissionswithGRANTALLPRIVILEGESONdatabase.*TO'username'@'host';anduseFLUSHPRIVILEGES;toapplychanges.Alwaysusestrongpasswo

MySQLofferseightstringdatatypes:CHAR,VARCHAR,BINARY,VARBINARY,BLOB,TEXT,ENUM,andSET.1)CHARisfixed-length,idealforconsistentdatalikecountrycodes.2)VARCHARisvariable-length,efficientforvaryingdatalikenames.3)BINARYandVARBINARYstorebinarydata,similartoC

ToaddauserinMySQL,usetheCREATEUSERstatement.1)UseCREATEUSER'newuser'@'localhost'IDENTIFIEDBY'password';tocreateauser.2)Enforcestrongpasswordpolicieswithvalidate_passwordpluginsettings.3)GrantspecificprivilegesusingGRANTstatement.4)Forremoteaccess,use

Stored procedures are precompiled SQL statements in MySQL for improving performance and simplifying complex operations. 1. Improve performance: After the first compilation, subsequent calls do not need to be recompiled. 2. Improve security: Restrict data table access through permission control. 3. Simplify complex operations: combine multiple SQL statements to simplify application layer logic.

The working principle of MySQL query cache is to store the results of SELECT query, and when the same query is executed again, the cached results are directly returned. 1) Query cache improves database reading performance and finds cached results through hash values. 2) Simple configuration, set query_cache_type and query_cache_size in MySQL configuration file. 3) Use the SQL_NO_CACHE keyword to disable the cache of specific queries. 4) In high-frequency update environments, query cache may cause performance bottlenecks and needs to be optimized for use through monitoring and adjustment of parameters.

The reasons why MySQL is widely used in various projects include: 1. High performance and scalability, supporting multiple storage engines; 2. Easy to use and maintain, simple configuration and rich tools; 3. Rich ecosystem, attracting a large number of community and third-party tool support; 4. Cross-platform support, suitable for multiple operating systems.

The steps for upgrading MySQL database include: 1. Backup the database, 2. Stop the current MySQL service, 3. Install the new version of MySQL, 4. Start the new version of MySQL service, 5. Recover the database. Compatibility issues are required during the upgrade process, and advanced tools such as PerconaToolkit can be used for testing and optimization.


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This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
