This may sound strange but is it possible to construct a SQL statement that search all the tables in a database for a specific value? I'm testing another person's Drupal(V.7) code and that code uses taxonomy_term_save function to import data in CSV format. I like to find the table where these data are stored. I don't know the field name either. Is it possible? I use MySQL.
SELECT * FROM databasenameHERE WHERE tablenameHERE = 'keyYouAreSearchingForHere'";
That is for MySql
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I have a web application where users can upload CSVs. I use Python Pandas to actually do the upload. I have to give the users the ability to change the database table's column's types such as from strings to datetimes. Is there a way to do this in Sqlalchemy? I'm working with reflected tables, and so I have Table objects with all their columns but I have a feeling that Sqlalchemy does not have this capability and that I will have to execute raw SQL to do this.
I am trying to copy the data from one table to another table. Normally using the SELECT command, we can read the whole table, and using the INSERT command we can insert the data into another table. But I don't want to use raw SQL command, I want to use SQLAlchemy ORM to copy and insert. Is there any way to do it?
Are you just trying to add an entry to a database, or are you trying to duplicate an entry?
Adding would be done by simply doing:
ed_user = User(name='ed', fullname='Ed Jones', nickname='edsnickname')
session.add(ed_user)
session.commit()
The example was taken from the official documentation. The commit will actually write the data added to the session, to the database.
EDIT:
you'll have to write something that parses the file into objects and add those objects to the database. Depends on what kind of file, if it's a database export, then you can just import with your preferred database tool. You can have a look at this blog post as well. Bottom-line is that if you want to import from csv / excel / txt, you'll have to write something for it.
Is there a way to import a csv into a SQL table, without having a previously-constructed table? I know how to import a csv into an existing table, but is there a way to create one from the csv?
You can do this using phpMyAdmin ,
(in this method csv file first row elements use as column names for the sql table)
1) select database
2) go to import tab and select csv file
3) ↓↓↓↓↓↓↓
4) after above steps new table will be created and if you want to change table names instead of having table1,table2
select table and go to operation tab :)
(phpMyAdmin 4.1.14)
I am no expert in MySQL but I don't believe there is such an import process. And there might not be in other database servers like Oracle, SQL Server, or PostgreSQL. In fact, it may not be a desirable automation as a table should be user defined and created to fit the database's relational model and for appropriate data types, indices, and keys.
Almost all SQL dialects require setting up the database table beforehand. If not, how would the system know beforehand you intended an integer or long number, a double or decimal number, a tinytext or longtext, which fields are to be indexed, or serve as primary key, and so on?
You might argue MS Access allows a CSV import with an optional table name. However, the ribbon wizard walks the user through setting up the field types, primary key, and table name. And going the non-wizard automation route, the DoCmd.TransferText method requires table name when using the acImportDelim argument.
So, your best process in MySQL may be LOAD DATA INFILE to run a bulk import of an external CSV into an existing table.
I am making csv file by sql2excell component for joomla. It calls the data by SQL queries, so I retrieve all the information through SQL queries. The problem is some that fields have extra information which I don't want to display to the end user.
For example, the fields show the data below when I retrieve by a query:
a:3:{s:4:"city";s:3:"000";s:3:"ext";s:3:"000";s:3:"tel";s:4:"0000";}
I only want the values that are in quotes, like this: 0000000000
Is there any way I can get this by an SQL query?
No.
These values are serialized and MySQL doesn't have functions to deserialize them. You have to make a bridge between MySQL and sql2excel which would decode it, but Im not familiar with this tool so can't be of much help.
is there a way to retrieve the result of a query / or to dump a whole table into an XML fragment which can be retrieved by using an XML query? I know there is something like this for PostgreSQL (9.0), table_to_xml()and query_to_xml().
I also know that mysqldump --xml can export XML, but I do seek for something that allows me to issue a simple query. The application I’m working on should allow some users to dump a certain table into an XML file on their machine, therefor I need to issue a query and obtain a String or something (is there an XML type in MySQL?).
I need the result to be XML and a Result Set of a query, not a file on server or something.
The query resulting in a SQL script similar to a MySQL dump for a single table would have three parts:
SHOW CREATE TABLE tblname - to generate CREATE TABLE statement.
DESCRIBE tblname - to retrieve column names for the construction of INTO(...) part of the INSERT queries.
SELECT * FROM tblname - to retrieve values for the construction of VALUES(...) part of the INSERT queries. Each row in the result set will correspond to an INSERT statement. INSERT statements will be generated in the loop handling the result set.
If this is to be done from MySQL, it can be wrapped into a stored procedure.
Found this in a question here at stackoverflow, as linked in the comments. Proposes to manually build XML in a query, like
SELECT concat("<this-is-xml>", field1, "</this-is-xml>") FROM ...
Of course, xml-charcter escaping and so on has to be done manually.
There seems to be no native way to directly get the result of a query as xml.
There is also a library (lib_mysqludf_xql) for mysql which provides XML functionality for MySQL.
INTO OUTFILE will dump the results to an XML file, so you could then send that to a client.