Searching Multiple Fields In Access Database For Match

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Basically what I am trying to achieve is the proper select statement to search each field or column in my access database table.

VB.NET

Public Shared Function Access_Find_Match(ByVal MatchString As String) As Boolean
        Dim Access_Command As New OleDbCommand("SELECT * FROM Table WHERE Field0 = '" & MatchString & "'" Or "Field1 = '" & MatchString & "'" Or "Field2 = '" & MatchString & "'", Access_Database)
        Using Access_Datareader As OleDbDataReader = Access_Command.ExecuteReader
            Return CStr(Access_Datareader.Read)
        End Using
    End Function

I get a error when using the "Or" to try and search each field

C#

Conversion from string "SELECT * FROM Table WHERE Field0" to type 'Long' is not valid.

If I change the "Or" to "&" I get the error

C#

Syntax error (missing operator) in query expression 'Field0= 'MatchString'Field1= 'MatchString'field3= 'MatchString'.

what would be the correct SELECT string to use in this case or what error exists in the syntax?, is the error possibly caused by the return type of the function?

Any help with this is greatly appreciated!

Posted 11-Jan-16 20:14pm

Draco2013

Updated 11-Jan-16 20:16pm

v2

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_Asif_ · Accepted Answer · 2016-01-11T20:28:00

The SQL Query should be like

SQL

SELECT * 
FROM Table WHERE Field0 = '<somestringvalue>'
OR Field1 = '<somestringvalue>'
OR Field2 = '<somestringvalue>'</somestringvalue></somestringvalue></somestringvalue>

Your code should look like

VB

Dim Access_Command As New OleDbCommand(String.Format("SELECT * FROM Table WHERE Field0 = '{0)' OR Field1 = '{0} OR FIELD2 = '{0}'", MatchString), Access_Database);

However the above approach is error prone to SQL Injection Attacks, you need to parameterize your query.

DamithSL · Accepted Answer · 2016-01-11T20:29:00

try with below,

VB

Dim Access_Command As New OleDbCommand("SELECT * FROM Table WHERE Field0 = '" & MatchString & "' Or Field1 = '" & MatchString & "' Or Field2 = '" & MatchString & "'", Access_Database)

You better use sql parameters to avoid sql injection attacks. then,

VB

 Dim Access_Command As New OleDbCommand("SELECT * FROM Table WHERE Field0 = ? Or Field1 = ? Or Field2 = ?", Access_Database)
Access_Command.Parameters.AddWithValue("p1",MatchString)
Access_Command.Parameters.AddWithValue("p2",MatchString)
Access_Command.Parameters.AddWithValue("p3",MatchString)

Searching Multiple Fields In Access Database For Match

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