How do I drop all empty tables from a MySQL database? -

-

How do I leave all the empty tables from a MySQL database, except at least those 1 tables that have the record?

This stored procedure should: 

  DELIMITER $$ drop Process if exists' drop_empty_tables_from` $$ Process to create 'drop_time_tables_prom' (IN schema_trade VARCHAR (128)) summary table_list text; Total records VARCHAR (11); SELECT GROUP_CONCAT (`TABLE_NAME`), table (` TABLE_NAME` in the list), with the total `info_schema`.`tables`` where`TamilCAKMAA = 'schema_tag and`tab_ROS` = 0; If table_list is not fired, then set @drop_tables = CONCAT ("drop table", table_list); Prepare STMT with @drop_tables; EXTUTE STMT; Deluxe Prepare STMT; end if; Select Effective Tables Overall; END $$ DELIMITER;

There may be a problem with that empty code with "GROUP_CONCAT" . It depends on the value of the system variable.

It is not possible to do this in a query, because the drop table can not get the argument from a SELECT query.

InnoDB note

Thanks to James for his comment it appears that the row count query will not return accurate results in the case of Inodbi tables, so The above process is not guaranteed to be fully functional, when there are INODABAI tables in that schema.

InnoDB tables for, line count is only a true estimate used in SQL optimization. (It is also true that the Inodibi table is divided.)

Source:


Comments

Post a Comment

Popular posts from this blog

asp.net - Javascript/DOM Why is does my form not support submit()? -

-
This is my first time working with asp.net and javascript, so I do not know very good web resources, or Much about javascript debugging I have to find out that on line oFormObject.submit (); Microsoft JScript Runtime Error: Object does not support this property or method I am using the link to work as a button because I am terrible in aesthetics and I think That link will look more professional than a table of 50 buttons. I have read that this solution can cause problems with browsers due to pre-rendering of my links and many additional traffic and problems, but CSS gives me a button like a link, which has issues of alignment and difference seemed to. & lt ;! DOCTYPE HTML PUBLIC "- // W3C // DTD HTML 4.01 // N" "http://www.w3.org/TR/html4/strict.dtd"> & Lt; Html xmlns = "http://www.w3.org/1999/xhtml" & gt; & Lt; Head & gt; & Lt; Link rel = "stylesheet" type = "text / css" href = "defect differen
Read more

sockets - Delphi: TTcpServer, connection reset when reading -

-
I am trying to implement one for Delphi, but there are some problems with communication. Fitnesse will start my process, and give me a portmember as a command line argument. Then I should make a socket on the port number given to me, and fitness will connect to that port I am using a TCPCP server for the job: < Pre> TcpServer1.LocalPort: = ParamStr (ParamCount); TcpServer1 Active: = true; On OnEXEPT () -Event, I send the protocol version to use as specified in the protocol. Process TForm1.TcpServer1Accept (From: TOBject; ClientSocket: TCustomIpClient); Var s: ansistring; Start clientSocket. Syndrome ('slim - v 0.0', # 10); SetLength (S, 6); ClientSketts Receavebook (S, 6); End; When I call ReceiveBuf (), the process ends, and fitness throws an exception: java.net.SocketException: connection Reset I have seen what sent and received. It shows that my code sends the protocol version, fitness sends back a message, and when I try to get this message
Read more

javascript - Classic ASP "ExecuteGlobal" statement acting differently on two servers -

-
I have a strange problem that I really do not know. In addition to developing a new ASP.NET site, I have to support the old "classic ASP" site. It is written in VBScript with a batch of JavaScript functions. Many of the JavaScript functions include 'files' Everything is fine on our production system (which security is controlled by another group - this is a military installation) Debugging them once did not work I). However, I have a fix for a vague bug that needs to be fully tested and some functions do not run under the "local" copy of the website that runs on my PC. For the record, I am running IIS 5.1 on XP. The problem is that some Javascript functions are running "OK" on the production server, but when they use it as a server, they are not defined on my PC what is happening that last Programmer, for some reason, has decided to put some functions in a series of files, which according to the observations, imitate the "need_once
Read more