mysql

Reset auto increment column value in script mysql

Hi, I have two mysql tables, one needs to start its auto-increment column id with the last value of the last inserted row in the other table (plus 1). According to mysql manual you can restart the value of an auto increment column like this: mysql> ALTER TABLE tbl AUTO_INCREMENT = 100; However, this is not possible: mysql> ALTER...

how do i update database using ADODB.Recordset?

i am using excel to connect to a mysql database: Dim dpath, atime, rtime, lcalib, aname, rname, bstate, instrument As String Dim rs As ADODB.Recordset Set rs = New ADODB.Recordset ConnectDB With wsBooks rs.Open "batchinfo", oConn, adOpenKeyset, adLockOptimistic, adCmdTable Worksheets.Item("Report 1").Select ...

difference between cn.execute and rs.update?

i am connecting to mysql from excel using odbc. the following illustrates how i am updating the rs With rs .AddNew ' create a new record ' add values to each field in the record .Fields("datapath") = dpath .Fields("analysistime") = atime .Fields("reporttime") = rtime .Fields("lastcalib") = lcalib .Fields("ana...

why is ADODB inserting NULL values on update?

i have: With rs .AddNew ' create a new record ' add values to each field in the record .Fields("datapath") = dpath .Fields("analysistime") = "atime" .Fields("reporttime") = "rtime" .Fields("lastcalib") = "lcalib" .Fields("analystname") = "aname" .Fields("reportname") = "rname" .Fields("batchstate") = ...

SQL algorithm question to convert a table

i have a table like this: number stuff1 stuff2 stuff3 ------------------------------- 1 x y 2 a 3 b 4 c d e i want to use a sql statement to turn it into this: number stuff1 stuff2 stuff3 ------------------------------- 1 x 1 y 2 a 3 b 4 c ...

Vertically Merge Multiple Tables in MySQL by Joint Primary Key

Hello, I'll attempt to make my question as clear as possible. I'm fairly unexperienced with SQL, only know the really basic queries. In order to have a better idea I'd been reading the MySQL manual for the past few days, but I couldn't really find a concrete solution and my needs are quite specific. I've got 3 MySQL MyISAM tables: table...

what does this ADO OPEN Method do?

in plain english can you explain to me what happens here: rs.Open "batchinfo", oConn, adOpenKeyset, adLockOptimistic, adCmdTable what i need to do is to be able to insert values into a table called batchinfo. would this be the best way to do an OPEN? the only thing i would be doing is inserting values. ...

[php] mysql and encoding

I moved my php application to the new server. i use mysql5 db. When i'm Updating or Inserting something to db, every " and - sign changed to ?. I use SET NAMES UTF8 and SET CHARACTER SET but it don't work. Any ideas? ...

How do I create a user history?

I want to create a user history function that allows shows users what they done. ex: commented on an ad, posted an ad, voted on an ad, etc. How exactly do I do this? I was thinking about... in my site, when they log in it stores their user_id ($_SESSION['user_id']) so I guess whenever an user posts an ad(postad.php), ...

MySQL: Search for a field, then replace another field in the same row.

Sorry if the question is stupid but I'm newbie to MySQL and got stuck with this. Let's suppose I have the following table in MySQL: City.........Country.....Restaurants Rome......Italy.............3032 Paris.......France........5220 I want to search for the city "Paris" and update the field "Restaurants" (replace 5220 with 5300). Wh...

mysql to get depth of record, count parent and ancestor records

Hey All, Say I have a post table containing the fields post_id and parent_post_id. I want to return every record in the post table with a count of the "depth" of the post. By depth, I mean, how many parent and ancestor records exist. Take this data for example... post_id parent_post_id ------- -------------- 1 null 2 ...

How to find the latest row for each group of data

Hi All, I have a tricky problem that I'm trying to find the most effective method to solve. Here's a simplified version of my View structure. Table: Audits AuditID | PublicationID | AuditEndDate | AuditStartDate 1 | 3 | 13/05/2010 | 01/01/2010 2 | 1 | 31/12/2009 | 01/10/2009 3 | 3 ...

ADODB: difference between ADDNEW and UPDATE methods?

i am updating a table in mysql using ADODB i am adding new entries into a table should i be using addnew or update? ...

Getting a table's values into a tree

So, I have a table like such: id|root|kw1|kw2|kw3|kw4|kw5|name 1| A| B| C| D| E| F|fileA 2| A| B| | | | |fileB 3| B| C| D| E| | |fileC 4| A| B| | | | |fileD (several hundred rows...) And I need to get it into a tree like the following: *A *B -fileB -fileD *C *D *E *F -fil...

Calculate the year for ending month/day?

Given: Start Year Start Month & Start Day End Month & End Day What SQL statement results in TRUE if a date lands between the Start and End days? The problem is in finding the end year so as to get a start_date and an end_date. ...

Mysql- "FLUSH TABLES WITH READ LOCK" started automatically

I would like to understand how this happened. I was running a query that would take a long time, but should not lock up any table. However, my dbs were practically down - it seems like it was being locked up by "FLUSH TABLES WITH READ LOCK" 03:21:31 select type_id, count(*) from guid_target_infos group by type_id 02:38:11 select type_...

How can I secure my $_GETs in PHP?

My profile.php displays all the user's postings,comments,pictures. If the user wants to delete, it sends the posting's id to the remove.php so it's like remove.php?action=removeposting&posting_id=2. If they want to remove a picture, it's remove.php?action=removepicture&picture_id=1. Using the get data, I do a query to the database to d...

Dummies guide to locking in innodb

The typical documentation on locking in innodb is way too confusing. I think it will be of great value to have a "dummies guide to innodb locking" I will start, and I will gather all responses as a wiki: The column needs to be indexed before row level locking applies. EXAMPLE: delete row where column1=10; will lock up the table unle...

Update a list of things without hitting every entry

I have a list in a database that the user should be able to order. itemname| order value (int) --------+--------------------- salad | 1 mango | 2 orange | 3 apples | 4 On load from the database, I simply order by order_value. By drag 'n drop, he should be able to move apples so that it appears at the top of the li...

Archiving an Entire Rails Site

I have a Ruby on Rails site that was only needed for a short period of time during which users added various objects to a mySQL database, commenting on them, associating themselves with them, etc. etc. etc. The question is this: the site is no longer needed until a week next year around this time when I will clear the database and use ...