1. Working with Delphi— from Database Perspective
Using Query Component

2. Main content The Basic Functions of Query Component
Database property
SQL property
Design mode
Run-time mode
Params property
Active property
Dynamic SQL Statement Setting in Query
Query Componenet Application Samples

3. Manipulating Query Opening a Query Query.Open Query.ExecSQL
Browsing: Prior, Next, First, Last, Locate
Accessing: FieldValues['Sno'], Query['Sno'], FieldByName('Cno').AsString
Updating: Dynamic SQL Statement

4. Dynamic SQL Statement SQL property: Params property
Select … From … Where sno = :sno
Params property
ValueType
Value

5. Setting Query Parameter
Query.Close;
Query.ParaByName('Cno').AsString:=…
Query.Params[1].Value:=… …
Query.Open;
Query.ExecSQL;