mysql sort asc

The tbl_direct_pos_201506 table has 1.9 million data. Ddl:CREATE TABLE ' tbl_direct_pos_201506 ' (' Acq_ins_code ' char () not NULL DEFAULT ' COMMENT ' agency code ', ' Trace_num ' char (6) N OT null default ' COMMENT ' tracking number ', '

tbl_direct_pos_201506 table has 1.9 million data, DDL:CREATE TABLE ' tbl_direct_pos_201506 ' (' Acq_ins_code ' char () not NULL DEFAULT ' COMMENT ' agency code ', ' Trace_num ' char (6) N OT null default ' COMMENT ' tracking number ', '

Note: Use BTREE to comindex ASC/DESC of each field to optimize order by query efficiency. btreeascThe tbl_direct_pos_201506 table has 1.9 million data, DDL: Create table 'tbl _ direct_pos_201506 '('acq _ ins_code' char (13) not null default

Note: Use the BTREE compound to index the ASC/DESC of each field to optimize the orderby query efficiency.The tbl_direct_pos_201506 table has 1.9 million data, DDL: Create table 'tbl _ direct_pos_201506 '('acq _ ins_code' char (13) not null default '

Demand Need to query whether the novel has broken more, the novel chapter information table has the release time: Pub_time, if the release time interval more than three days even if the break more Ideas Query the novel chapter

Concrete Example 1. PHP Server ComponentsFor beginners, it is recommended to use the integrated server component, which already includes PHP, Apache, Mysql and other services, eliminating the time spent by developers in the tedious configuration

The fifth chapter sort retrieves the dataThis chapter teaches you how to use the ORDER BY clause of a SELECT statement to sort the retrieved data as needed.5.1 Sorting DataAs described in the previous chapter, the following SQL statement returns a

Test Conditions for mysql index test: mysql> show create table users \ G; * *************************** 1. row *************************** Table: usersCreate Table: create table 'users' ('id' int (11) not null, 'name' varchar (45) default null, 'c1 '

This article mainly explains the mysql commands in centoslinux (redhatlinux). If your mysql is installed in source code, I add the "mysql installation directory bin" to the path environment variable, mysql startup script has been copied to etcinit.

Objective Sorting is a basic function of the database, and MySQL is no exception. The user is able to sort the specified result set by the order BY statement, not just the order by statement, the Group by statement, and the distinct statement