mysql odbc 5 1

1. Data Files1) MyISAM Table: There are three related files, data file. MYD, index file. myi, target file (definition file). FRM2) bdb table: contains two files, one. DB data file and one. frm target file.3) InnoDB table: it has its own target file. frm, but the actual data is stored in the upper-level Directory, which belongs to the same level as the database. 2. Log FilesError Log: Under the directory c:/program files/

Tags: from upd date fetch table fix Val array here PHP$DBI=NewDbmysql;$DBI-GT;DBH = ' Mysql://root:[email protected]/coffeetest '; $map=Array(); $DBI->fetchmap ("SHOW TABLES",$map); $tables=Array_keys($map); //Find tables containing CID fields $cid _tables=Array(); for($j= 0;$jCount($tables);$j++){ $map=Array(); $DBI->fetchmap ("DESCRIBE").$tables[$j],$map); foreach($map as $k=$v){ if($k= = ' CID ') { $cid _tables[] =$tables[

matches, ^ matches the beginning, the $ matches the end,. Match single character, [] match the characters in it (supported with-specified range), * match its preceding characters any number of times (I disagree when using *, because there may be problems when using *).Such as:Select ' Ssky ' ' [AB] ','Ssky's*';The result is:If by definition, the s* match does not match the KY, but the result is a return to True (1). Please advise me if you have any k

restart the MySQL database. In this case, the database upgrade in a simple environment is over. the second, the same applies to any storage engine. 1. Also install the new version of MySQL first. 2. In the old version, back up the database. # MKDIR/OPT/MYSQLSYSTEMS_BK; MYSQLDUMP-P3306-UROOT–TAB=/OPT/MYSQLSYSTEMS_BK mysqlsystems_com The Note:–tab option

BBS (php amp; mysql) full version (5) // below is menu_comment.js Function fwLoadMenus (){ If (window. fw_menu_0) return; Window. fw_menu_0 = new Menu ("root", 92,20, "Verdana, Arial, Helvetica, sans-serif", 12, "# 6666ff", "# ffffff", "# FF9999 ", "# 6666ff "); Fw_menu_0.addMenuItem ("Javascript", "window. open ('left. php', '_ self ');"); Fw_menu_0.addMenuItem ("Css Quick Start", "window. open ('left. ph

. It is important to note that the values in the INSERT statement above must be placed in pairs (...) for each record. In the middle, use "," split. Suppose there is a table table1 CREATE TABLE table1 (n INT); If you want to insert 5 records into Table1, the following is the wrong way to write: INSERT into table1 (i) VALUES (1,2,3,4,5); MySQL will throw the following error ERROR 1136:col

($board)) { Add_admin ($board, $name); } else { echo "Error occurred! (most likely the user does not exist) "; $founderr = 1; } } ElseIf (Isset ($delete _admin)) { if (Is_user_exits ($name)) { Del_admin ($name); } else { echo "Error occurred! (most likely the user does not exist) "; $founderr = 1; } } else { echo "What are you doing?" "; $founderr = 1; } if (! $

MySQL (Part 5) 1. bitwise operators Bitwise operators are used to test, shift, or test bitwise in binary bytes. The bitwise operators provided in MySQL include: bitwise OR (|), bitwise AND (), shift by bit or (^), shift by bit left ( Operator Function | Bit or Bitwise AND ^

case, m should be an integer ranging from 1 to 255. It indicates the number of characters used to display the column's median. For example, mediumint (4) specifies a mediumint column with a display width of 4 characters. If an integer column with no specific width is defined, it is automatically assigned a default width. The default value is the length of the "longest" value for each type. If the printable expression of a specific value requires more

When MySQL sees the table, it encounters the Select storage Engine: MyISAM and InnoDB. What kind of storage engine is good?1, MyISAM: Table lock, support full-text index, read concurrency performance is good.2, InnoDB: Row lock, support transaction, support foreign key, write concurrency performance is good.In fact, most of the companies now, MySQL's rules are using INNODB as the default storage engine, in

(5): bitsCN.com I. Insert data The Insert syntax is as follows: INSERT [LOW_PRIORITY | DELAYED | HIGH_PRIORITY] [IGNORE] [INTO] tbl_name [(col_name,...)] VALUES ({expr | DEFAULT },...), (...),... [on duplicate key update col_name = expr,...] or: INSERT [LOW_PRIORITY | DELAYED | HIGH_PRIORITY] [IGNORE] [INTO] tbl_name SET col_name = {expr | DEFAULT },... [on duplicate key update col_name = expr,...] or: INSERT [LOW_PRIORITY | HIGH_PRIORITY] [IGNORE] [I

MySQL (Part 5)Common operators 1. Arithmetic Operators Operator Function + Addition operation - Subtraction * Multiplication / Division % Remainder operation 2. Comparison Operators Operator Function = Equal Security equals. Can be used to determine N

Tags: price BSP-table name div Add index LTE tableto view the index of a tableShow create table table name; Show index from table name; Show keys from table name;Add index ALTER TABLE name add index index name (index field); ALTER TABLE goods Add index price (shop_price);1.PRIMARY KEY (PRIMARY KEY Index）Mysql>alter TABLE ' table_name ' ADD PRIMARY KEY (' column ')2.UNIQUE (Unique index)

Description: There is a member table, there is a birthday field, the value is ' YYYY-MM-DD ' format, now to query a time period of the birthday of members, such as ' 06-03 ' to ' 07-08 ' in this time period of all birthday members. SQL statement: The code is as follows Copy Code Select * from user Where date_format (birthday, '%m-%d ') >= ' 06-03 ' and date_format (birthday, '%m-%d ') Description: The commonly used time date processing function, the above

-called deadlock: refers to two or more than two processes in the course of execution, because of the competition for resources caused by a mutual waiting phenomenon, if there is no external force, they will not be able to advance. This is called the system is in a deadlock state or the system has produced a deadlock, these are always mutually aulympic process known as the deadlock process.second, the MySQL table-level lock lock Mode (MyISAM)

the Execute method (update, INSERT, delete update, INSERT, delete, etc.) Update $command = $connection->createcommand ("UPDATE country SET name= ' Brazil-haha ' WHERE code= ' BR '); $command->execute (); Update $connection->createcommand ()->update (' User ', [' status ' = 1], ' Age > ')->execute (); Insert $connection->createcommand ()->insert (' User ', [ ' name ' = ' Sam ', ' age ' = ' ) '->execute ();Insert multiple lines at once $co

Mysql-based Forum (5) # manage_read.php Require ("func. php "); If (check_admin_password ()){ $ Board = $ jl_forum [board]; Switch ($ job ){ Case "setgood ": Set_good ($ jl_forum [board], $ uid ); $ Work = 1; Break; Case "setnogood ": Set_no_good ($ jl_forum [board], $ uid ); $ Work = 1; Break; Case "delete ": Del_doc

Mysql-based Forum (5 ). # Manage_read.php? Phprequire (func. php); if (check_admin_password () {$ board $ jl_forum [board]; switch ($ job) {casesetgood: set_good ($ jl_forum [board], $ uid ); $ work1; break; case ## manage_read.php Require ("func. php "); If (check_admin_password ()){ $ Board = $ jl_forum [board]; Switch ($ job ){ Case "setgood ": Set_good ($ jl_forum [board], $ uid ); $ Work =

. which one is sequential and which one is random? Therefore, if you want to optimize MySQL, you must have a good grasp of the hardware, OS, and internal implementation principles of MySQL. This article describes the CPU and process of MySQL optimization. 1. NUMA and SMP in CPU architecture SMP: Shared Memory Mu

Marco's study Note 5-MYSQL preliminary 1. mysql -U USERNAME -P -H MYSQL_SERVER Linux: socket Windows: memory 2. command category in interactive mode Client commands Server commands Statement terminator is required. the default value is the block number. 3. relational database objects: Table Index View Constraints Stor