Use dB;
-- List all tables in the current database
Show tables;
Show tables like's % ';
Create Table Name
(
Column name type modification constraints,
Sid int (3) unsigned zerofill primary key auto_increment
Sgender Enum ('male', 'female ', 'confidential') default 'male'
) Engine = MyISAM default charset = utf8;
-- Create a table
Create Table if not exist
Tags: EAL migration session file generation CAs ora session key I. Temporary table The temporary table is placed in the temporal table space without generating redo, only with undo. You can create indexes, views, and triggers in a temporary table, and you can also export and import the definition of a temporary
Tags: oracle11gI. Temporary tablestemporary tables are placed in a temporary tablespace and do not generate redo, only undo. You can create indexes, views, and triggers in a staging table, and you can export and import the definition of a temporary table by using the "Export and import (export and import)" or "Data Pump (Pump)". However, the data is not exported even if the rows option is used. There are tr
#include The following basic operations are programmed to implement the order table: set up the order table, modify the order table, insert the Order table, and delete the order table.
In SQL server performance optimization, there is an incomparable problem: that is, how to process temporary datasets in a code that requires a long time or frequently called code? Table variables and temporary tables are two options. I remember seeing a large number of temporary data set processing requirements when I evaluated and optimized SQL Server application performance for a leading Chinese shipping company, their developers cannot determine wh
Database Table design. It is not best to have only the most suitable (adjacent table, Path Enumeration, nested set, closure table), enumeration packet tableWhen designing a database, do we break through the general rules and find the most suitable design scheme? The following is an example: A parent_id field will be added to the commonly used adjacent
Original post address: http://hi.baidu.com/liyanlin84/blog/item/eb306616cdb51e1c972b4389.html
Delete all data in the table, and you want to automatically increase the column from 1! Use truncate table tblname
Truncate is a SQL statement used to delete data table content. It is used as follows:Truncate table [
Technorati label: before creating a table in PL/SQL, determine whether the table exists.
Delete the execution statement of the table if any.
Since PL/SQL is used for Oracle client operations, since SQL 2005 was used to execute "before creating a table, determine whether the table
Tags: style blog color using data sp div problem cWith the long-term use of MySQL, there will certainly be some problems, in general, the MySQL table can not be accessed, it is possible to repair the table, optimized to reduce disk space, convenient backup. Table table_name // table table_name // optimization table
Copy codeThe Code is as follows:Repair table 'table _ name' REPAIR tableOptimize table 'table _ name' OPTIMIZE tableRepair table is used to REPAIR damaged tables.Optimize table is used to recycle idle database space. When the data
Code for implementing table fine-line table effects and table fine-line table code
Code for implementing the table thin-line table effect:Compared with the default table of the
Problem Description:Two Tables A and B, each with a field, update time A.MODIFIED_TM and B.modified_tm,a table as the main table, update time is not empty, but the B table update time may be empty, now to take a, B two table time the newest one, b.modified_ If the TM is empty, take A.modified_tm, for example:Table AID
1, add table B, same structure as table A (with data)CREATE TABLE B as SELECT * from A;2, add Table B, and the a table structure is the same (without with data)CREATE TABLE B as SELECT * from A where 1=2;3, there is a
For simpler tables, the amount of data is not a very much table, you can use a simple SQL statement to back up
CREATE TABLE t_fa_cat_20121207 as SELECT * from T_fa_cat
Create a new table and save the data
INSERT INTO T_fa_cat select * from t_fa_cat_20121207
To import the original backed-up data into a table to r
Query all table names: Select T.table_name from User_tables t; Query all field names: Select T.column_name from user_col_comments t; Query all field names for the specified table: Select T.column_name from user_col_comments t where T.table_name = ' biz_dict_xb '; Query all field names and field descriptions for the specified table: Select T.column_name, t.
Scenario 1: The following code defines the table broadband as 600px, the TD broadband is not set, 3 TD content is three-in-one, you can see 3 content divided into the width of table.That is, each TD is 200px (Please note: If you use Chrome to debug the width, there will be some error, because 600px also includes a border, so the actual width may be 198px, here is simplified, the same below).Next, modify the contents of the first TD and change the 1 to
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