MYSQL :: Copying Column Names And Properties From An Existing Table To A New Table?

Copying A Column Within A Table II
I'm trying to copy a column (Open) from a table into another column (Close) from the same table but skipping the first "cell" from the source column (Open).

I tried the following query: UPDATE Table SET `Open`=`Close` WHERE `ID`="2";

The query copies the whole source column (Open) into the destination column (Close) including the "cell" I'm trying to skip.

Search Table Column For Existing Value
I would like to search a table's column so that I can match an entered email address against the data in that column. I'm writing an aplication for an event and I don't want duplicate email addresses in the table. I'm using PHP4.

Getting Table Names As A Column
Let's say I have a database(mysql) with tables 1 to x (table1, table2,...)
Table1:
Columns: Description + Date

Now I want to get all the rows from table 1 and do a union with all the tablenames.

So my sql will be something like:
Select Description From Table1 UNION SHOW TABLES as Description ORDER BY Description Desc.

Column And Table Names
i have a large problem , my hosting wont give me access to my phpmyadmin and so I cant backup my database, So I looked to back it up using php which was complicated and confusing, so I decided before they cut me off completely I would write a sql statement to list all table names and then all table columns in each table. I dont mind writing each script seperately. i.e. list all table names, then write a script to view names of the column for each table. I only have 20 tables so no big deal, getting really desperate. If someone could either post a script they have I can copy and customise, or point me in a direction I would appreciate that. Im no idiot at sql, just have never had to do this before and am unsure how to go about it.

How Do You Discern The Type Of An Existing Mysql Table Column?
I have a program that needs to be able to know whether a MySQL column is a number type or other. Is there a function that does this, or can anyone else suggest a way of discerning this reliably using SQL statements?

Retrieve List Of Column Names From A Table
Can anyone tell me the function that retrieves a list of column names from a table? Sorry to bother with a small request but I'm having difficulty finding this.

Using Results From One Table To Populate Column Names In Another
I have a table of gene names. I would like to use this table to populate the column names of a second table (all these columns will be of the same type ie INT(4) to represent expression level). The list of genes is large so I don't want to type in the columns by hand.

Changing Table Feild Properties
I am wanting change the information inside of a table. Right now it has a table for profiles with alot of feilds. One feild has countries in it and I want to put states.

Populate Table With Database Names Or Table Names
I would like to insert the names of all databases on a server in a table. I know about "show databases", but how can I get it's results into a table?

Once I know how to do this, I think I will be able to figure out how to do a similar thing with all tables in a database, and with all fields in a table.

Table Joins On Existing/Non-Existing Data
I have a question that involves a joining tables on potentially non-existing data, but we will know the expected values whether they exist or not.

Say we're keeping statistics on any given number of sports for attendances over weekly time periods. There's two tables to hold data.

------------------------------
TABLE: StatisticTypes
id
name
------------------------------
TABLE: Statistics
id
statisticTypeId
value
date
------------------------------

Then, say, we have three entries in the StatisticTypes table for types of sports we're keeping data on...

Change Column Properties
1. I have a table "students" with id, fname, mname, and lname columns. The 'mname' column can accept NULL.

The Submit button on the form was clicked a number of times, and because there was no input validation, I have records with nothing for fname and lname, and NULL for mname. I want to prune the table of these empty records.

I can delete records with no lname, but how would I test for empty? It's not NULL -- just empty. I was expecting the INSERT to return an error if a column doesn't accept NULL...

2. Also, can column properties be changed? For example, can I make a column that doesn't accept NULL to start accepting NULL? Can I add or remove other properties for an existing column? I am not sure how to plan a database, so I want to be able to alter it as the need arises. Will it always require making a new column and deleting the old one?

3. Is there a short tutorial or guide that helps plan for a database. The are a ton that help you create a simple basic DB, but I'm looking for one that will help me plan one right the first time.

Comparing Table Names With Entries In A Different Table
Let's say that all of my tables names are types of animals, i.e. cat, dog, mouse, horse, etc... I also have another table, call it 'Master', that basically is a master list of various information. Within this table there is a field called 'name' in which there are animal names, i.e, cat, dog, mouse, etc. What I would like to do is to run a query that compares all of the table names in my database to the entries in the field 'name' within the 'Master' table. I would like the query to return any table names that don't match up with an entry in the 'name' field of the 'Master' table. For example, if I have the following tables in my database:

cat, dog, mouse, horse, badger, Master

and within the table 'Master', I have the following entries in the field 'name':

cat, dog, mouse, horse, badger, cow, snake, rabbit

then the query that I would like to run would return: cow, snake, and rabbit, Master. This is a much simpler example, obviously than the actual amount of tables and information in my real database.

Copying To A New Table From An Old Table, With Indexes
I'm using the following command to make a copy of an existing table:

CREATE TABLE new_table_name SELECT * FROM source_table_name;
However this doesn't copy indexes. Is there any way to alter this command so that indexes are also copied?

"table Is Read Only" After Copying Table Files To New Server
I'm trying to port my MySQL tables for a database called "tracerlock" from
one server to another. On the old server, in the /var/lib/mysql/tracerlock
directory, there was a ".MYD", ".MYI" and ".frm" file for every table in
the database. So after creating a database called "tracerlock" on the new
server, I copied these files over to the /var/lib/mysql/tracerlock
directory on the new server. On both servers, all the table files are
owned by user "mysql" in the "mysql" group.

Now, when I connect to MySQL on the new machine and load the tracerlock
database, "show tables" shows all the tables as expected, and I can perform
SELECT statements on them and get the correct results. But when I try
doing INSERT statements on one of the tables that was copied over, I get:

mysql> INSERT INTO test VALUES(3);
ERROR 1036: Table 'test' is read only

However, if I create a new table called test2, I can perform INSERT
statements on it with no error:

mysql> insert into test2 values(3);
Query OK, 1 row affected (0.00 sec)

Code:

Copying A Table With Everything?
i need an efficient way to copy an entire table, with indices and all the other info
contained in the current table. these tables are massive, some with over 350 million
rows so i need a way to do this in a reasonable amount of time.

Copying One Table Into An Other
I have one table Bin0 containing data and one empty table Bin1. Now I want to move all entries from Bin0 to Bin1. Both table only have one column. What is the best way to do this?

Copying A Table
Is there a way to copy an entire table's information to a new table in the same database?

Copying One Table Into Another?
I have a styles table which serves as a kinda template for my styles on my php app. I want my users to be able to copy styles into themes and hammer away on their themes settings themselves if they so wish.

Can I just copy one set of data into another using one sql statement?

Something like ...

Copying Table
I'm trying to copy a table from one mysqld to another.

I've tried things like :

mysqldump -h remotehost --quick --single-transaction database table | mysql database

but I don't get all the data. It only copies 16789 rows when the original table has 10018090 rows.

I don't get any error messages or anything (that I've found).

How To Add A New Row To An Existing Table?
I am able to create database, tables, inserting values, and so forth. My question is this:

Let's say I have a table on the list of items I owned, and some time later, I need to add a new item between after row 12 and before 13. How do I do that? I did look at MySQL 5.0 Manual and didn't find anything similar to what I wanted to do.

Copying Data Into Another Table?
Can someone please tell me how I can copy one item in one row into another table? I am wanting to do the above when a comment is being added to the second table. Thanks in advance.

My tables are like this:
Article (Articleid, selectDay, selectMonth, selectYear, article_item)
Users (Userid, username, password, email, ip)
Commentpost (Articleid, userid, comments, date_entered)

Copying DB Table Definitions
I've been working on a MySql database project, and I will soon need to move to a different development machine. What is the best way to get all my tables set up identically on the new computer?

I'm hoping there is some way to get MySql to generate (for an existing table) the code that would create that table if it were not already present.

Right now the best solution I've found is going into MySql Query Browser and running a DESCRIBE command for each table. I can then right-click the resultset and export it to an html file. From each table's desription, I could easily re-create the tables on another machine.

Copying A Large Table
I need to copy a large table without locking the database.

So at the moment i have

Insert into newtable select * from oldtable.

This locks the database for 10 seconds which although doesn't sound like a lot of time is 2 much for what i need the database for!.

I have looked at these commands

FOR UPDATE.
LOCK IN SHARE MODE.
SQL_BUFFER_RESULT

But I am not quite sure if any of these actually perform what i would like to do.

The other option is to update the table line by line or in chunks using limit i suppose. But im sure there must be a better way.

Copying A Table From One Schema To Another
Is it possible to copy a table from one schema to another schema by just
copying the frm file to the directory for the new schema?

What is the best way to create a new database with all the tables in it
automatically?

I was hoping to have the tables (the frm files) included in a subdirectory
and when required, just create a new schema then copy all the frm files into
it.

Copying Data Within A Table
I have a table with about 30 columns and one index. I need to copy a subset of this table back into the same table while changing one value. Obviously this doesn't include the index. The value that I need to change is the one that I will query against to find the subset.

IE: Select * from dogs where color = 'black'

Now take the results of that query and copy it back into the same table with color='white'.

The table has an idex with auto_increment and primary key. I don't want to do anything that would mess this up.

Does this make sense? What Im trying to do is setup a demo of some software using copies of live data. I need to alter the live data a bit to protect the confidentiality of the customer(s). Rather than re-entering data for the demo Id rather copy and alter if its possible and no too huge of a PITA.

Copying Data From One Table To Another
I have a mysql database named swg_db
in that database I have 2 tables, one named swg_user which contains the following fields: username, password, email

the second table is named vbb_user which contains the following fields: username, user_password, user_email

The data in table 1 in password and email is hosed, table 2 is not.

I am trying to figure out the right commands, in the right order, to compare usernames, if they are the same, copy the user_password data from table 2 into the password field in table 1 and to copy the data from the user_email field in table 2 into the email field on table 1.

Copying Data To New Table
I created a new table for my data, and I'd like to copy the data from the first table to the second. The thing is, some of the fields have been removed, and some added. Is it possible to just copy over everything from the rows that has matching fields?

Copying Table Data
Im currently writing an IT database for the company i work for *small thing, more for our use* to keep users and computers data upto date. Anyway things have developed and its going to push to company wide. So currently i have a colum structure as follows

Code:

UserName
Department
MachineNum

Using Table A Column Row Data For Table B Column Headings
Is it possible to add column data in table A and have (dynamically
linked) table B column headers?

Foreign Key To Existing Table?
Is it possible to add a foreign key to a table that already exists? Or do I have to drop the table and recreate it?

Insert Row Into Existing Table
I have a table with rougly 70 threads, I now need to go back and insert a couple new entries into my table, but they cant go at the end, they need to go in the middle, say like ID 40,41,and 42. How do I do this?

Copy Of An Existing Table
MySQL: How I make a copy of an existing table in phpMyAdmin or SQL ?

without copy data
with copy and data

Copying Or Backingup A Mysql Table
tblVital is part of the db "test" in MySQL, on "C:" via the usual mysqlin mysql route.

How would I say COPY tblVital - or even BACK-UP tblVital, whichever is the most efficient way, please, Gurus?

Automatically Copying Data From One Table To Another
im working on a project for uni and basically i want to know if its possible for a table to automatically copy data from one table into itself (they are both in the same database)

i want to create a system where a user registers giving their password, i then want the username and password to be stored in a separate table where it is encrypted and when a user wants to login into the system i want their details to be checked against the details in the table where everything is encrypted.

Copying Table To Disk During Execution
I seem to be having an issue with a query's results being paged out to
disk during runtime. I notice in processlist it saying "Copying to tmp
table on disk".

select col1, col2, count(ip) as 'COUNT' from db.table group by 2 order
by 1, 3;

None of the columns are a primary/foreign or an index. This query
returns 92K rows and has taken anywhere from 50 seconds to run to over
1.5 minutes. The table size on disk is around 33MB.

After doing some research i found that i should be changing the
tmp_table_size system variable. Originally it was set to the MySQL
default, 33554432. I set the varaible to 90,000,000 and it still
started paging out to the disk (this was the only query running at the
time). I would think that 90MB in space would have been enough to
handle the query since that would assume over 600K row size.

I actually had some trouble setting the tmp_table_size for the global
variable but was able to change it as a session variable.

I have also tried altering the query_cache variable (which has only
slowed the query down - currently it sits at a size of 50MB) and also
the sort_buffer_size but neither have made a difference.

What is the magic variable that i should be messing with?

Assigning Userids To Existing Table
I have a table of existing users in a database. I want to add a "userid" column to the database that automatically assigns an ID to each user when new accounts are added to the system. I know I would do something like this if I had the brains to have added the column at the time of creating the table:

ALTER TABLE writers ADD (
userid int PRIMARY KEY auto_increment
);

However, the table is now already active with users, and I want userids assigned to existing accounts on the system.

Import Data Via Ssh Into An Existing Table
I want to import data from several .sql files into an existing database, into one table.

I tried using the following command:
mysql -e [sqlfile] [db_name]

But the problem was when I imported the next file, it would overwrite the previous imported data.

Could anyone let me know how to do this correctly, please?

Add Multiple Rows To An Existing Table?
I have a table named manufacturers, it has one row in right now. I want to upload all of my manufacturers into the table. Is there a way to add multiple rows to the table at the same time? If not, what is a quick way to get about 1,000 manufacturers uploaded into a table?

Append Existing Data In A Table
I am working on an existing osCommerce store. There are over 200 products, each of which needs the associated image file name changed.

Rather than do this manually (any number of ways), I am unsure if there is a query I can run to save me lots of aggravation. What I would like to do is update whatever is in the field and change it to add the same 5 characters:

The Table is Products
The Field is products_image

Examples of existing data in this field are:

abcdef.jpg
ght.jpg
fire_777.jpg
oops.gif (the replacement image is a jpg)

The result I seek is:

abcdef_th.jpg
ght_th.jpg
fire_777_th.jpg
oops._th.jpg

Logic tells me to start at the end of the data, remove the last 4 characters (.jpg) and append 5, in this case: _th.jpg Could someone please give me a hand with this? I have spent many days redoing the image files and they are nearly ready to go into a live store.

How To Add A Auto_increment Field To An Existing Table
I want to add a field called "id" starting from 1 and auto increment, but it seems that mysql doesn't allow me to do the following.

alter table existing_table add id INT AUTO_increment;

Message: Incorrect table definition; there can be only one auto column and it must be defined as a key. But I don't have a key or auto column in the existing_table.

Adding A Foreign Key Into An Existing Table
May I know how should I do that?

The SQL statement should be:

CREATE TABLE USER_SYSTEM_SECURITY (
USERID VARCHAR(32),
HOSTID VARCHAR(32),
HOME_DIRECTORY VARCHAR(32) NOT NULL,
ACCESS_RIGHTS INT(3) NOT NULL,
PASSWORD_EXPIRY_DATE DATE,
ROLES VARCHAR(32) NOT NULL,
PRIMARY KEY (USERID, HOSTID),
FOREIGN KEY (USERID) REFERENCES MEMBER (USERID) ON DELETE CASCADE,
FOREIGN KEY (HOSTID) REFERENCES SYSTEM (HOSTID) ON DELETE CASCADE);

But I forgot to add in the last row during the table creation.

Auto Increment Existing Table
I have an existing table with many rows of data. I want to add auto increment to it so I do not have to manually asign each row a unique record number.

Copying Selected Data From Two Tables Into One Table
I have a list of members in my "members" table, and they can buy tickets for an event. When they buy them, their member id number and the ticket info is stored in the "transactions" table. For the final "tickets" table, which I want to print out to put on the door, I also need to have their email and name, which is in the "members" table but not the "transactions" table.

What I want to do is insert bits of the "transactions" table into the "tickets" table, and then also use the member id number from the "transactions" table to lift out the corresponding member name and email address and insert them in as well.

Here's what I tried before I realised that I probably need something quite a bit more complicated:

INSERT INTO tickets (SELECT transaction_id, ticket_member_id, ticket_code FROM transactions), (SELECT name, email FROM members WHERE member_id=ticket_member_id)

member_id is the one in the "members" table.

Basically, here's what I want the "tickets" table to look like (the columns):

transaction_id (from "transactions")
ticket_member_id (from "transactions")
ticket_code (from "transactions")
name (from "members" using ticket_member_id)
email (from "members" using ticket_member_id)

I think I need to use a while to iterate through everything but just thought I'd check in case there's an easy way.

Taking Colomns Of Data And Copying It To A Different Table
I've got two pieces of software running and I want to force users to only use the one log in so I though rather than trying to build a plug in I thought a cron job would no-doubt be easier.

Now getting the data I want from the right table is easy enough for me but as the columns have different ID's I need to make it transpose it into the right columns... It runs but I suspect the second part of my code is failing. Code:

Delete Rows From Table A, Which Dont Exist In Table B (base On Column X)
I have 2 tables identically structured.

A & B

Table A, has column: Product (product code) as primary key

Table B doesn't.

Apart from that they have the exact same fields.

There's also a column: supplier

I want to

Delete * from table A, where does not exist in B (based on column: Product) & where supplier = apples

So to elaborate. Table A is my main table, but it now contains outdated products from supplier apple. Table B has the latest list of products from supplier apple. So I want to remove old products from A that supplier apple no longer makes.

mysql version 4.0.27

How To Import Data Into Existing Rows Of A Table?
I have moved 665 records off of Filemaker into mysql-4.0.18. I had a
great deal of trouble exporting a text field, possibly because it had
control characters that interferred with my field delimiter (also it
was from a Mac, and I'm new at this.)

So I have a table called invoices and another table called tasks, that
has only an invoice number and the work billed on that invoice number.
To see the work billed along with the other invoice data I have to do
a join, and this works but is clumsy for me. Since tasks.work is a
text field of 'infinite' variety I don't see the sense of keeping it
in a separate table like I would with clients' info; it belongs *in*
the invoice table, not just with it.

Is it possible to import this text data into a field in the invoice
table? I've messed around with this but it always appends the data as
new records. Perhaps I was doing an insert back then. Is the answer
something like 'load data infile 'workdone.csv' into invoices
(workdone);'

The invoices table was filled in a certain order (by invoice number)
and the workdone.csv was exported in the same order, so each invoice
row should get its correct text.

Is this a good thing, or am I thinking too 'flat-file-ish'?

Copying Column Names And Properties From An Existing Table To A New Table?

I've got a table with 42 columns, set to different types (string, datetime, date, integer). It has 8 million rows. I want to make a new table with the exact same columns, but with no data in it. Is there an easy way to do this without re-defining every column?