在项目中发现有这样的写法 SELECT ZoneID,CountSQAZFZSBJZ3G+CountSQGZJRJZSL3G AS column1FROM G3MulticarrierSiteCoverTableFrm union SELECT 合计 as ZoneID,sum(CountSQAZFZSBJZ3G+CountSQGZJRJZSL3G) AS column1FROM G3MulticarrierSiteCoverTableFrm 发面“CountSQAZFZSBJZ3G+Count…
VB.NET中使用Linq TO SQL添加数据后获得自增长列ID: Dim tempOrdre As New Order With { .CustomerID = cmbCustomerName.SelectedValue.ToString, .ProductID = cmbProductSpec.SelectedValue.ToString, .ProductNumber = txtProductNumber.Text.Trim, .BatchNO = txtBatchNO.Text.Tri…
不解释: ---先创建外键的column ALTER TABLE tblLicenses ADD ProductID int not null; ---添加外键 ALTER TABLE tblLicenses ADD FOREIGN KEY (ProductID) REFERENCES tblProducts(ID) ---先创建外键的column Alter Table tblActivationRecords Add LicenseID bigint not null; ---添加带名字的外…