mysql desc

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MySQL desc (DESCRIBE) command instance to explain _php tips

The MySQL desc command is used to view the table structure, which is the shorthand form for the describe command. MySQL desc command syntax: DESC TableName What information does the command display on the table? The specific include:

Note the asc/desc of each field using the BTREE composite Index to optimize the efficiency of the ORDER by query

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 ', '

Note the asc/desc of each field using the BTREE composite Index to optimize the efficiency of the ORDER by query

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 ', '

MySQL DESC commands

Source: http://zhumeng8337797.blog.163.com/blog/static/100768914201179112318218/ 1. DESC tablename;For example, mysql> DESC jos_modules;+ ------------------ + --------------------- + ------ + ----- + --------------------- + ---------------- +| FIELD

Note: Use BTREE to comindex ASC/DESC of each field to optimize order by query efficiency. btreeasc

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

Mysql desc: ERROR 1 (HY000): Can & #39; t create/write to fi

When using mysql, when I want to use desc to view the table structure, the following error message is displayed: ERROR 1 (HY000): Can't create/write to file '/tmp/#sql_1737_0.MYI' (Errcode: 13) I have never met anyone. I searched the internet. The

Note: Use the BTREE compound to index the ASC/DESC of each field to optimize the orderby query efficiency.

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 '

Desc Description of all tables in the Python build database

after the database design is complete, it is often necessary to keep a desc description of all tables in the database in a wiki or other document, in particular the meaning and purpose of each field. It is not advisable to manually generate the

Commands in Oracle with MySQL show databases, show tables, desc table similar command set

1 How to execute a SQL script file, this script file writes a series of sets of SQL statements, such as Sql.sql placed under D:\MyEclipse 8.6\workspaces\oasystem\webroot\sql.sql"CD D:\MyEclipse 8.6\workspaces\oasystem\webroot\>>sqlplus>>@ Sql.sql;2

NOTES: MySQL ascending asc, descending desc

Often forget MySQL in ascending and descending with what characters, now make a note: ascending asc, descending desc, for example, the following is a time descending call column of the article, also is the column of the latest

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