DbExtensions - How to create WHERE clause with OR conditions? - ado.net

Question

I'm trying to create WHERE clause with OR conditions using DbExtensions.
I'm trying to generate SQL statement which looks like
SELECT ID, NAME
FROM EMPLOYEE
WHERE ID = 100 OR NAME = 'TEST'
My C# code is
var sql = SQL.SELECT("ID, FIRSTNAME")
.FROM("EMPLOYEE")
.WHERE("ID = {0}", 10)
.WHERE("NAME = {0}", "TEST");
How do I get the OR seperator using the above mentioned DbExtensions library?

Answer 1

I have found a definition for logical OR operator here
public SqlBuilder _OR<T>(IEnumerable<T> items, string itemFormat, Func<T, object[]> parametersFactory) {
return _ForEach(items, "({0})", itemFormat, " OR ", parametersFactory);
}
And some code examples here
public SqlBuilder Or() {
int[][] parameters = { new[] { 1, 2 }, new[] { 3, 4} };
return SQL
.SELECT("p.ProductID, p.ProductName")
.FROM("Products p")
.WHERE()
._OR(parameters, "(p.CategoryID = {0} AND p.SupplierID = {1})", p => new object[] { p[0], p[1] })
.ORDER_BY("p.ProductName, p.ProductID DESC");
}
I think (by analogy with example) in your case code should be something like this (but I can't test it for sure):
var params = new string[] { "TEST" };
var sql = SQL.SELECT("ID, FIRSTNAME")
.FROM("EMPLOYEE")
.WHERE("ID = {0}", 10)
._OR(params, "NAME = {0}", p => new object[] { p })
Hope this helps :)
By the way... have you tried this way?
var sql = SQL.SELECT("ID, FIRSTNAME")
.FROM("EMPLOYEE")
.WHERE(string.Format("ID = {0} OR NAME = '{1}'", 10, "TEST"))

Answer 2

It's simpler than you think:
var sql = SQL
.SELECT("ID, FIRSTNAME")
.FROM("EMPLOYEE")
.WHERE("(ID = {0} OR NAME = {1})", 10, "TEST");

Answer 3

One can use:
.AppendClause("OR", ",", "NAME = {0}",new object[]{"TEST"});