SQL 如何在SQL中选择表的最后一条记录？
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How to select the last record of a table in SQL?
提问by Tassisto
This is a sample code to select all records from a table. Can someone show me how to select the last record of that table?
这是从表中选择所有记录的示例代码。有人可以告诉我如何选择该表的最后一条记录吗？
select * from table
When I use: SELECT * FROM TABLE ORDER BY ID DESC LIMITI get this error: Line 1: Incorrect syntax near 'LIMIT'.
This is the code I use:
当我使用时：SELECT * FROM TABLE ORDER BY ID DESC LIMIT我收到此错误：第 1 行：'LIMIT' 附近的语法不正确。这是我使用的代码：
private void LastRecord()
{
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["HELPDESK_OUTLOOKConnectionString3"].ToString());
conn.Open();
SqlDataReader myReader = null;
SqlCommand myCommand = new SqlCommand("SELECT * FROM HD_AANVRAGEN ORDER BY " +
"aanvraag_id DESC LIMIT 1", conn);
myReader = myCommand.ExecuteReader();
while (myReader.Read())
{
TextBox1.Text = (myReader["aanvraag_id"].ToString());
TextBox1.Text += (myReader["wijziging_nummer"].ToString());
TextBox1.Text += (myReader["melding_id"].ToString());
TextBox1.Text += (myReader["aanvraag_titel"].ToString());
TextBox1.Text += (myReader["aanvraag_omschrijving"].ToString());
TextBox1.Text += (myReader["doorlooptijd_id"].ToString());
TextBox1.Text += (myReader["rapporteren"].ToString());
TextBox1.Text += (myReader["werknemer_id"].ToString());
TextBox1.Text += (myReader["outlook_id"].ToString());
}
}
回答by Adriaan Stander
Without any further information, which Database etc the best we can do is something like
没有任何进一步的信息，我们可以做的最好的数据库等是这样的
Sql Server
数据库服务器
SELECT TOP 1 * FROM Table ORDER BY ID DESC
MySql
数据库
SELECT * FROM Table ORDER BY ID DESC LIMIT 1
回答by Neil Knight
Assuming you have an Id column:
假设您有一个 Id 列：
SELECT TOP 1 *
FROM table
ORDER
BY Id DESC;
Also, this will work on SQL Server. I think that MySQL you might need to use:
此外，这将适用于 SQL Server。我认为您可能需要使用 MySQL：
SELECT *
FROM table
ORDER
BY Id DESC
LIMIT 1
But, I'm not 100% sure about this.
但是，我不是 100% 确定这一点。
EDIT
编辑
Looking at the other answers, I'm now 100% confident that I'm correct with the MySQL statement :o)
查看其他答案，我现在 100% 确信我对 MySQL 语句是正确的:o)
EDIT
编辑
Just seen your latest comment. You could do:
刚看到你的最新评论。你可以这样做：
SELECT MAX(Id)
FROM table
This will get you the highest Id number.
这将为您提供最高的 ID 号。
回答by Ricardo Fercher
to get the last rowof a SQL-Databaseuse this sql string:
要获取SQL 数据库的最后一行，请使用以下 sql 字符串：
SELECT * FROM TableName WHERE id=(SELECT max(id) FROM TableName);
Output:
输出：
Last Line of your db!
你数据库的最后一行！
回答by Simon
SELECT * FROM TABLE ORDER BY ID DESC LIMIT 1
Yes this is mysql, SQL Server:
是的，这是 mysql，SQL Server：
SELECT TOP 1 * FROM Table ORDER BY ID DESC
回答by Simon
SELECT * FROM table ORDER BY Id DESC LIMIT 1
回答by jeje
The last is just the first when you reverse your ordering.
当您颠倒顺序时，最后一个只是第一个。
回答by GeeDee
In Oracle, you can do:
在 Oracle 中，您可以执行以下操作：
SELECT *
FROM (SELECT EMP.*,ROWNUM FROM EMP ORDER BY ROWNUM DESC)
WHERE ROWNUM=1;
This is one of the possible ways.
这是可能的方法之一。
回答by Panjas51
select ADU.itemid, ADU.startdate, internalcostprice
from ADUITEMINTERNALCOSTPRICE ADU
right join
(select max(STARTDATE) as Max_date, itemid
from ADUITEMINTERNALCOSTPRICE
group by itemid) as A
on A.ITEMID = ADU.ITEMID
and startdate= Max_date
回答by Jenna Leaf
It is always a good practice in your table design to have an automatic row identifier, such as
在您的表设计中使用自动行标识符始终是一个好习惯，例如
[RowID] [int] IDENTITY(1,1) NOT FOR REPLICATION NOT NULL
, then you can identify your last row by
，然后您可以通过以下方式识别您的最后一行
select * from yourTable where rowID = @@IDENTITY
回答by Chanuka Fernando
I think this should do it.
我认为应该这样做。
declare @x int;
select @x = max(id) from table_name;
select * from where id = @x;
