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MySQL slave distributed system architecture, no word library maintenance costs, there is no thesaurus synchronization problem. 2. Disadvantages:①, mysqlcft Chinese Full-text indexing only applies to MyISAM tables, because MySQL only supports fulltext indexing of myisam tables;②, MySQL can not be statically compiled installation, otherwise can not install MYSQLCF

Problem: Log Of Failures (2)Mysql> create table t21 INT, primary key (s1 ))Engine = innodb ;//Mysql> create table t3 (s1 INT, KEY (s1 ),Foreign key (s1) REFERENCES t2 (s1 ))Engine = innodb ;//Mysql> insert into t3 VALUES (5 );//...ERROR 1216 (23000): Cannot add or update a child row: a foreign keyConstraint fails (the

1. MySQL has multiple rows that access tables. The most commonly used rows are sequential access and index access. Sequential access refers to browsing a table in one row, that is, full table scan. Disadvantage: It is very time-consuming and inefficient. Index access: Read Only the rows that show the required features, including at least one index, similar to the directory in the book. Www.2cto.com index: a

char (NOT NULL),> Sex int (4) NOT null default ' 0 ',> Degree double (16,2));2. Get the table structureCommand: DESC table name, or Show columns from table nameMysql>describe MyClassmysql> desc MyClass;Mysql> show columns from MyClass;3, delete the tableCommand: DROP table For example, to delete a table named MyClassmysql> drop table MyClass;4. Inserting dataCommand: INSERT into For example, insert two records into table MyClass, two records that say

1. Sample Problem: Log Of Failures Problem example: Fault RecordWhen INSERT fails, I want to record it in the log file to demonstrate the error handling example. I want to get an error record. When the INSERT operation fails, I want to record the error information in another file, such as the error time and cause. I am particularly interested in insertion because it violates the foreign key Association constraints.2. Sample Problem: Log Of Failures (2

/archives/2008/02/12/1425/ Falcon Manual: http://dev.mysql.com/doc/falcon/en/ SOLIDDB Storage Engine The SOLIDDB storage engine is developed by solid information Technology (http://www.soliddb.com), a transactional storage engine that utilizes MVCC for implementation. It supports both pessimistic and optimistic concurrency control, which is not currently supported by other storage engines. The MySQL version of SOLIBDB includes full support for fore

Tags: databases mysql SQL databaseFirst, the cmd common MySQL related commandsmysql-d,--database=name//Open Database--delimiter=name//Specify delimiter-H,--host=name//server name-P,--password[=name]//password-P,--Port[=name]//Port number--prompt==name//Setup prompt-U,--user=name//user name-V,--version//output version numberCan be used in combination, such as input-uusernam-ppassword login user name usrname

One, the CMD frequently uses the MySQL related commandmysql-d,--database=name//Open Database--delimiter=name//Specify delimiter-H,--host=name//server name-P,--password[=name]//password-P,--Port[=name]//Port number--prompt==name//Setup prompt-U,--user=name//username-V,--version//output versionAble to use combination, such as input-uusernam-ppassword login username for usrname password for password accountII. Basic data typesIntegral type:

bracket # For example, call the stored procedure defined above Call Productpricing (); # Even without passing arguments, the parentheses "()" Behind the stored procedure name are also required The method for deleting a stored procedure is: Drop Procudure productpricing; To create a stored procedure with parameters: Create Procudure productpricing ( Out P1 decimal (8,2), Out ph Decimal (8,2), Out PA decimal (8,2) ) Begin Select min (prod_price) into PL-products

MySQL (CAPI) VC instance and Code Download (1 ). 1. note: copy a table (copy only structure, source table name: a new table name: B) SQL: select * intobfromawhere112. description: copy a table (copy data, source table name: a target table name: B) SQL: inser 1. description:

MySQL (CAPI) VC instance and Code Download (1) (3 ). 4. CREATETABLEhard (quchar (11), cochar (11), jenumeric (3, 0) insertintohardvalues (A, 1, 3) insertintoh 4. maximum sorting of query data (only one statement can be used for writing) Create table hard (qu char (11), co char (11), je numeric (3, 0 )) Insert into har