public override SqlProvider FormatUpdate <T>(T entity, string[] excludeFields)
{
var update = ResolveExpression.ResolveUpdates <T>(entity, Params, excludeFields);
var fromTableSql = FormatTableName(false, false);
ProviderOption.IsAsName = false;
var whereSql = ResolveExpression.ResolveWhereList();
//如果不存在条件，就用主键作为条件
if (whereSql.Trim().Equals("WHERE 1=1"))
{
whereSql += GetIdentityWhere(entity, Params);
}
SqlString = $"UPDATE {fromTableSql} {update} {whereSql}";
return(this);
}