For each column in a row of the result, the name of that column is used as an index in to array and the value of the column is stored in the corresponding array entry. If two or more columns in the result set of a query have the same name, then the last column with that name will overwrite prior values and earlier columns with the same name will be inaccessible. If the array variable name is omitted or is the empty string, then the value of each column is stored in a variable with the same name as the column itself.
Make sure you are using the correct connection component for your client library version. So if you have the client libraries installed for MySQL 4. There are several ways you can deal with this: It is preferable that all users including root have passwords.
Test the action of the database system using the examples given in the manual, and check that all users really do have reliable access. You can find the fpc source directory in Lazarus: This directory also contains the units mysql.
Before running the test script, you need to create a database called testdb: So change the script using an editor so that the line invoking mysql reads: With luck you might have managed to create the test database: Now try to run the test program testdb.
I found that the program could not connect to mysql for several reasons: My system SuSE Linux v9. The program needs to have user names and passwords to get access to the database.
I created a copy of testdb. I changed the uses statement in trydb. For good measure I also created the link ln -s libmysqlclient. Some users might need to add the following link: This section looks extremely outdated.
To complicate things further, the number of parameters seems to have changed between version3 where there are seven and version4 where there are eight. So the code for connection to the database is now: I got the listing of the FPC developers! A few extra refinements: See Sample Console Listing.
Connecting to MySQL from a Lazarus Application This tutorial shows how to connect Lazarus to the MySQL database, and execute simple queries, using only the basic Lazarus components; it uses no Data Aware components, but illustrates the principles of interfacing with the database.
Create a new project in Lazarus: From the Standard Component tab place three Edit Boxes on the upper left side of the Form, and immediately above each box place a label.
Alternatively you could use LabelledEdit components from the Additional tab. Select the Passwd Edit box and find the PasswordChar property: Make sure that the Text property of each edit box is blank.
Now place another Edit box and label at the top of the right side of your form. Place three Buttons on the form: Find its ScrollBars property and select ssAutoBoth so that scroll bars appear automatically if text fills the space.
Make the WordWrap property True. A screenshot of the Form can be seen here: Mysql Example Screenshot Now we need to write some event handlers. The three Edit boxes on the left are for entry of hostname, username and password. When these have been entered satisfactorily, the Connect Button is clicked.
The responses from the database should be converted into strings and displayed in the Memo box. Strings are displayed in the Memo box using: Add S end; The ConnectButton event handler thus becomes: The SendQuery event handler is again based on the FPC text-mode version, except that once again explicit type-conversion has to be done before strings are displayed in the box.
A difference from the text-mode FPC program is that if an error condition is detected, the program does not halt and MySQL is not closed; instead, control is returned to the main form and an opportunity is given to correct the entry before the command is re-submitted.
The code for SendQuery follows:In Android, there are several ways to store persistent data. SQLite is one way of storing app data. It is very lightweight database that comes with Android OS. In Android, integrating SQLite is a tedious task as it needs writing lot of boilerplate code to store simple data.
Make sure that the anonymous web user account (NETWORK SERVICE or maybe something else) under which your web application executes has read/write/create/delete access to the folder where the sqlite database resides. Could also be that The database file is not supported by the MigrationAssembly.
The same exception is thrown when the EF tries to migrate on a file expected to be a SQLite database which is fi. a text file. error "attempt to write a readonly database". I have a database I have created and populated with various tables and data. I now want to create a new table and I get.
Realm Swift is the first database built for mobile. An alternative to SQLite and Core Data that's fast, easy to use, and open source. Google Analytics lets you measure your advertising ROI as well as track your Flash, video, and social networking sites and applications.