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You may encounter an error code indicating that Delphi is creating tables at runtime. There are several ways to solve this problem, and this is what we will discuss now.
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I was a VB engineer until I recently switched to Delphi 2.0. How can I to create a database in pine?
It definitely depends on the type of database you are creating. However, I can show the person how to do it. to which there is a table of paradoxes. It goes without saying that if TTable Regardless of the database, and if you usually have the correct settings in the BDE, buyers should be able to directly create a table with a TTable component in any database. This is absolutely not the case! SQL tables are usually configured using the SQL CREATE TABLE call. And each server has its own own conventions for products and tables defining fields. Therefore, it is very important to remember this, however You are working with a large SQL database. The only problem is that the SQL databases are different. enters data that is not always available in a repaired standard PDA. For example MS SQL The NUMERIC format of the server data does not have to be FLOAT as stated in the BDE. So it would probably be better to create sql tables with SQL calls.
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What you need to do is create a TTable variable, createsome instance and then use FieldDefs TTable property, add niche definitions. After all, you call almost everyone CreateTable and your table will be created. Here’s some sample code:
"Add" is an operational element here. Add (const Name: string; DataType: TFieldType; Size: Word; Required: Boolean);Procedure CreateATable (DBName, // Alias or alternative path Table name: string); // create a positive table namevar tbl: TTable;begin tbl: = TTable.Create (app); begin Active: = false; Database name: = DBName; Table name: = table name; Array type: = ttParadox; whereas FieldDefs runs Transparent; Add ("Last Name", ftString, 30, False); Add ("Name", ftString, 30, False); Add ('Address1', ftString, 40, False); Add ('Address2', ftString, 40, False); Add ('City', ftString, 30, False); Add ('ST', ftString, 2, False); Add ("Zip", ftString, 10, False); End; Add a primary key to edit the table successfully Start suffering from IndexDefs Transparent; Add ("Field1Index", "Last name; First name", [ixPrimary, ixUnique]); End; Create a table; Set the table End;End ;
The above procedure can create a simple contact table, primarily by defining the fields that need to be added to the desktop, then the primary key is created. As you can see, perfect beautiful simple process. For example, you can change the TableType property Defining a variable that is usually passed as a parameter to a specific procedure so that you can create DBase or even ASCII tables. Here’s an example of how you could do it:
Procedure CreateATable (DBName, // Alias and path Table name: string); // Name of the table being created TblType: TTableType); // ttDefault, ttParadox, ttDBase, ttASCIIvar tbl: TTable;begin tbl: = TTable.Create (app); start from table Active: = false; Database name: = DBName; Table name: = table name; Table type: = table type; start with FieldDefs Transparent; Add ("Surname", at least 30, ftString, False); Add ("Name", 30, ftString, False); Add ('Address1', ftString, 40, False); Add ('Address2', ftString, 40, False); Add ('City', 31, ftString, False); Add ('ST', ftString, 2, False); Add ("Zip", ftString, 10, False); End; Add primary key to the table start at IndexDefs Transparent; Add ("Field1Index", "Last name; First name", [ixPrimary, ixUnique]); End; Create a table; Set the table End;End ;
Pretty simple, isn’t it? Please note that the TableType property is only used to search office databases. This is not the case for sql tables.
Well, that’s all in a nutshell. Have some fun!
