Console.WriteLine("SqlCommandBuilder实例的Update命令:"+scb.GetUpdateCommand().CommandText);//将有变动的行同步到数据库中adapter.Update(dataTable.GetChanges());//保存修改dataTable.AcceptChanges();//下面是一个遍历输出datatable中的数据foreach(DataTable tableindataSet.Tables) {foreach(DataRow rowintable....
The default value is 1. Increment: It specifies the incremental value that is added to the identity column value of the previous row. The default value is 1.实例:PersonId int identity(1, 1), -- 或者通过修改表的方式加入 ALTER TABLE Person ADD PersonId INT IDENTITY(1,1); How to ...
The OPEN command populates the cursor with the data, either dynamically or in a temporary table, and readies the first row for consumption by the FETCH statement. FETCH Cursor FETCH [[NEXT] FROM] <Cursor Name> INTO <Variable 1> [,<Variable n>] The FETCH state...
Every table in a relational database should have some method of distinguishing each row from all the others. The most common method is to designate a column as the primary key that will have a unique value for each row. sometimes a combination of columns may be required, but the most comm...
SQL Server doesn’t support FOR EACH ROW triggers in which the trigger code is run once for each row of modified data. Trigger Run AFTER triggers runs after DML statements complete run. INSTEAD OF triggers run code in place of the original DML statement. You ca...
FOR EACH ROW BEGIN SELECT EVSYS_SETUPGUIDE_ID.NEXTVAL INTO :NEW.ID FROM END; 1. 2. 3. 4. 5. 6. 7. 四、总结 转换工具并非万能,尽量精简之后再进行翻译;翻译之后,还要进行修正。我最终,还是写了一个工具来做这些辅助工作。比如,字段注释,可以在自行开发的工具里使用正则表达式进行自动替换: ...
Verify that the data is in the global temporary table: SELECT * FROM ##temp_customers It should fetch 13 rows. Update a row: -- update row from session 1 update ##temp_customers set cust_name = 'TEST' where id = 'GREAL' -- 1 row update Session 2 Connect to...
@@FETCH_STATUS in nested loops @@ServerName returns wrong value in SQL SERVER 2008 ##TempTable and INSERT-SELECT FROM an existing Table with an IDENTITY column %rowtype equivalent in SQL server ++ operator in TSQL - bug or feature? 2 tables referencing each other using foreig...
Operation Update of primary key columns Primary key columns in memory-optimized tables and table types cannot be updated. If the primary key needs to be updated, delete the old row and insert the new row with the updated primary key. Operation CREATE INDEX Indexes on memory-optimized tables mu...
BULK INSERT is a Transact-SQL statement that implements a bulk data-loading process, inserting multiple rows into a table, reading data from an external sequential file. Use of BULK INSERT results in better performance than processes that issue individual INSERT statements for each row to be adde...