sql CREATETABLEnew_tableAS SELECT*FROMsource_table; 与INSERT INTO ... SELECT一样,你也可以只选择特定的列。 3.使用COPY命令(特定于某些数据库) 例如,在PostgreSQL中,你可以使用COPY命令来快速复制表数据到文件或从文件复制数据到表。但这通常用于与文件系统的交互,而不是在表之间复制数据。 4.使用数据库特定...
ta = db.TableAs.Where(tn => tn.Name == name).FirstOrDefault(); // If the record was found move it if( ta != null ) { TableB tb = new TableB { Name = ta.Name, Age = ta.Age, ... }; db.TableBs.InsertOnSubmit(tb); db.TableAs.DeleteOnSubmit(ta); db.SubmitChanges();...
In order to make sure that the tables will be created in the destination database, click ontheEdit Mappingsbutton and make sure that theCreate destination tableoption is ticked, and if any of your tables contain Identity column, make sure to tick theEnable identity insertoption, then click th...
SQL Self JOIN SQL CTE (Common Table Expressions) SQL SELECT INTO (Copy Table) In SQL, the SELECT INTO statement is used to copy data from one table to another. Example -- copy all the contents of a table to a new table SELECT * INTO CustomersCopy FROM Customers; Here, the SQL co...
Condition: Specify the condition to populate to filter the records. If you want to copy the specific dataset from the source table, you can use the WHERE clause When you copy the data from the source table to destination tables, MySQL performs the following tasks: Create a new table with...
SQL> SQL> SQL> -- create demo table SQL> create table Employee( 2 ID VARCHAR2(4 BYTE) NOT NULL, 3 First_Name VARCHAR2(10 BYTE), 4 Last_Name VARCHAR2(10 BYTE), 5 Start_Date DATE, 6 End_Date DATE, 7 Salary Number(8,2), 8 City VARCHAR2(10 BYTE), 9 Description VARCHAR2(15...
SQL > SQL Commands > Insert Into Select Statement The INSERT INTO SELECT statement is used to add multiple new records into a database table at one time. SyntaxThe syntax for INSERT INTO SELECT is as follows: INSERT INTO "table1" ("column1", "column2", ...) SELECT "column3", "...
The easiest way to create a copy of a table is to use a Transact-SQL command. Use SELECT INTO to extract all the rows from an existing table into the new table. The new table must not exist already. The following example will copy theCustomerstable under theSalesschema to a new table...
table_name 表的名字(可以有模式修饰)。 取值范围:已存在的表名。 column_name 可选的待复制字段列表。 取值范围:如果没有声明字段列表,将使用所有字段。 STDIN 声明输入是来自标准输入。 STDOUT 声明输出打印到标准输出。 FIXED 打开字段固定长度模式。在字段固定长度模式下,不能声明DELIMITER,NULL,CSV选项。指定FIX...
You can copy columns from one table to another, copying either just the column definition, or the definition and data. 注意 A new version of Table Designer appears for databases in the SQL Server 2012 format. This topic describes the old version of Table Designer, which you use with database...