convert json to mysql table

Php code for querying mysql data table records. Php and mysql are prime combinations. now let's talk about the implementation of querying mysql database records in php. The four php and mysql functions mysql_connectmysql_querymysql_select_dbmysql_fetch_array are prime combin

table structure can be optimized enough to ensure excellent performance and meet scalability requirements. It is unknown that the database design 3 paradigm, which was regarded as the "Bible" N years ago, has not been fully applied. Here I have sorted out some common optimization techniques for database table structure design, hoping to be useful to you. This is the second article in the

Label:Detailed syntax for MySQL modification table ALTER [IGNORE] TABLE tbl_name [Alter_specification [, Alter_specification] ...] [Partition_options] Algorithm_option: algorithm [=] {default| inplace| COPY} Lock_option: LOCK [=] {default| none| shared| EXCLUSIVE} Alter_specification: Table_options | ADD [COLUMN] col_name column_definition [First | After Col_

(name) VALUES ('Egon');7 8 CREATE TABLE Admin (9 ID int primary key auto_increment,Ten user_id int unique, unique OnePassword varchar (20), A constraint foreign key (user_id) refreences User (UID) The associated field must be unique - On update Cascade - On Delete Cascade the ); -Insert into admin (User_id,password) VALUES (3,'alex3714'); - -2.2Note that the associated field must be unique to the associated field + -2.3sample students and custo

FROM tbl_name AS a WHERE. col_name = 1 or. col_name = 2; if it is difficult to use uppercase or lowercase letters in the memory database and table name, we recommend that you use the same conventions, such as creating databases and tables with lowercase letters. Another way to avoid this problem is to start mysqld with the-O lower_case_table_names = 1 parameter. By default, this option is 1 in Windows and 0 in Unix. If lower_case_table_names is 1,

;Mysql> select * from mytable;The results of the two queries are the same. Both queries are mytable tables, but mytable tables cannot be found (as you can see, but cannot be found)Let's try again to create a mytable table.Mysql> create table mytable (id int not null, name varchar (10), dt date );Error 1050 (42s01): table 'mytable' already existsThe

Mysql encoding, data table encoding view and modification Summary 1. view the mysql encoding that you have installed 2. view the Mysql supported encoding 3. view the database encoding 4. view the data table encoding (showcreatetableuserG ;) 5. modify my. INI file to modify t

I almost did not write a blog, feel the knowledge to learn and to do too many things, no time. But found that the blog record their learning experience is very good, take time to write points for their future reference also share to some people, I have limited level, please more advice!Recently tried to develop a small OA system on its own to consolidate its own learning of the Java SSH framework. Here is a record of the development of some of the experience.I put the system menu into a tree, wi

Mysql converts the character encoding of a table to UTF-8.Copy codeThe Code is as follows:Alter table tb_anniversary convert to character set utf8; Modify mysql character encoding to UTF8 Step 1: view the current character encoding methodCopy codeThe Code is as follows:Mysql

The following error was reported in the Select for Chinese queryERROR 1267 (HY000): illegal mix of collations (latin1_swedish_ci,implicit) and (utf8_general_ci,coercible) for operation ' =Look at the encoding of the tableShow CREATE TABLE t_user_friend;Discover that it is latin1 encoded and need to be turned into UTF8The command is as followsALTER TABLE T_user_friend co