<add name="SqlServer"connectionString="server=localhost;user id=sa;pwd=sa123;database=TestMySqlServer;"providerName="System.Data.SqlClient"/> <!--sqlite数据库配置--> <!--<add name="PrintCertificate.Properties.Setti
Suppose, our table contains 5 rows. In this case, the above SQL command selects40%of the total rows (2 rows). WITH TIES in TOP TheWITH TIESclause is used to select more rows if there are similar values to the last row. Let's take an example: SELECTTOP3WITHTIESfirst_name, countryF...
QueryFirst puts a command in your Tools menu that will run all queries in your application and regenerate all wrapper classes. As such, you can integration-test all your queries at any time, and changes in your database schema will directly produce compilation errors in your application. If t...
int countQuery = 0;//批量修改影响的行数 using (SqlConnection conns = new SqlConnection(conn)) { conns.Open(); using (SqlCommand command = new SqlCommand("", conns)) { try { command.CommandText = sbDelete;//先清空数据库 int a = command.ExecuteNonQuery(); if (a != 0) { return -2...
CopyCommandFileFormatType CopyCommandIdentityInsert CopyCredentialOption CopyOption CopyOptionKind CopyStatement CopyStatementOptionBase CreateAggregateStatement CreateApplicationRoleStatement CreateAssemblyStatement CreateAsymmetricKeyStatement CreateAvailabilityGroupStatement CreateBrokerPriorityStatement CreateCertificateS...
Our edited migration is ready to go, so let’s useUpdate-Databaseto bring the database up-to-date. This time let’s specify the–Verboseflag so that you can see the SQL that Code First Migrations is running. Run theUpdate-Database –Verbosecommand in Package Manager Console. ...
├── sql-common ├── storage ├── strings ├── support-files ├── testclients ├── unittest ├── utilities ├── vio └── xtrabackup8.2.0-1103directories 2、编译命令: # --- --- --- --- --- --- --- ---../gcc-10.5.0/configure --disable-multilib --disable...
There’s a command that will run the migrations for you and manage your database schema automatically - that’s calledmigrate, and we’ll come to it in a moment - but first, let’s see what SQL that migration would run. Thesqlmigratecommand takes migration names and returns their SQL: ...
This function is used to obtain the value of the first data record in the window corresponding to the current row.The restrictions on using window functions are as follow
.SqlGenerationHelper.DelimitIdentifier(operation.Name,operation.Schema))51.Append('.')52.Append(Dependencies.SqlGenerationHelper.DelimitIdentifier(columnOp.Name))53.Append(" IS ")54.Append($"'{columnComment}'")55.Append(Dependencies.SqlGenerationHelper.StatementTerminator);56}57builder.EndCommand();...