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如何新增一個Paradox table

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a120803
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#1 引用回覆 回覆 發表時間:2003-04-03 18:04:53 IP:163.25.xxx.xxx 未訂閱
請問各位大大: 如何新增一個Paradox table,及裡面的FieldDef如何使用 那如果要讀取FieldDef如何做
hagar
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#2 引用回覆 回覆 發表時間:2003-04-03 18:09:21 IP:202.39.xxx.xxx 未訂閱
begin
  with TTable.Create(self) do begin 
    DatabaseName := 'db'; 
    TableName := 'TableA'; 
    TableType := ttParadox; 
    with FieldDefs do Begin 
      Add('Age', ftInteger, 0, True); 
      Add('Name', ftString, 25, False); 
      Add('Weight', ftFloat, 0, False); 
    End; 
    IndexDefs.Add('MainIndex','IntField', [ixPrimary, ixUnique]); 
    CreateTable; 
  end; 
end;
--- 每個人都是一本書
a120803
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#3 引用回覆 回覆 發表時間:2003-04-03 18:17:01 IP:163.25.xxx.xxx 未訂閱
謝謝大大: 那如果是要讀取table的FieldDefs要如何做ㄋ
hagar
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#4 引用回覆 回覆 發表時間:2003-04-03 18:38:50 IP:202.39.xxx.xxx 未訂閱
截自 Help 中的範例:
procedure TForm1.Button1Click(Sender: TObject);
var i: Integer;
begin
  Table1.Active := True;
  for i:= 1 to Table1.FieldDefs.Count - 1 do
  begin
    ListBox1.Items.Add(Table1.FieldDefs[i].Name);
  end;
  Table1.Active := False;
end;
--- 每個人都是一本書
Mickey
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#5 引用回覆 回覆 發表時間:2003-04-04 00:40:54 IP:218.32.xxx.xxx 未訂閱
截自 LocalSQL.hlp
CREATE TABLE table_reference (column_definition [, column_definition,...] [, primary_key_constraint])    Description    Use the CREATE TABLE statement to create a dBASE or Paradox table, define its columns, and define a primary key constraint.     The table name reference for CREATE TABLE must comply with the rules described in the section on naming conventions. Table names with embedded spaces must be enclosed in quotation marks.    Column definitions consist of a comma-separated list of combinations of column name, data type, and (if applicable) dimensions. The list of column definitions must be enclosed in parentheses. The number and type of dimensions that must be specified varies with column type. See the section on defining column types for specific syntax of all supported column types.    Use the PRIMARY KEY (or CONSTRAINT) keyword to create a primary index for the new table.The following statement creates a Paradox table with a PRIMARY KEY constraint on the LAST_NAME and FIRST_NAME columns:    CREATE TABLE "employee.db"    (
  Last_Name CHAR(20),
  First_Name CHAR(15),
  Salary NUMERIC(10,2),
  Dept_No SMALLINT,
  PRIMARY KEY (Last_Name, First_Name)    )    An alternate syntax for creating a primary key constraint is using the CONSTRAINT keyword. While Paradox primary indexes do not have names, an arbitrary name needs to be provided to satisfy the CONSTRAINT keyword need for a token name.    CREATE TABLE "employee.db"    (
  Last_Name CHAR(20),
  First_Name CHAR(15),
  Salary NUMERIC(10,2),
  Dept_No SMALLINT,
  CONSTRAINT z PRIMARY KEY (Last_Name, First_Name)    )    Indicate whether the table is a Paradox or dBASE table by specifying the file extension when naming the table:    ".DB" for Paradox tables
        ".DBF" for dBASE tables    If you omit the file extension for a local table name, the table created is the table type specified in the Default Driver setting in the System INIT page of the BDE Administrator utility. When specifying a file extension, the table name reference for CREATE TABLE must be enclosed in quotation marks.    Column definitions based on domains are not supported. Primary keys are the only form of constraint that can be defined with CREATE TABLE.    Note        To create a table with columns that have non-alphanumeric characters or spaces in the column name, you must enclose the column name in quotation marks and prefix the quoted column name with the table name in quotes (if the filename extension is included) or just the table name. Any one of the three variations below are acceptable.    CREATE TABLE "abc.db"    (
  ID CHAR(3),
  "ABC.db"."Funny Name" CHAR(10)    )    CREATE TABLE abc    (
  ID CHAR(3),
  ABC."Funny Name" CHAR(10)    )    CREATE TABLE "abc.db"    (
  ID CHAR(3),
  ABC."Funny Name" CHAR(10)    )
系統時間:2024-06-29 15:38:12
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