SQL È¡nµ½mÌõ¼Ç¼
1.
select top m * from tablename where id not in (select top n id from tablename)
2.
select top m * into ÁÙʱ±í(»ò±í±äÁ¿) from tablename order by columnname -- ½«top m±Ê²åÈë
set rowcount n
select * from ±í±äÁ¿ order by columnname desc
3.
select top n * from
(select top m * from tablename order by columnname) a
order by columnname desc
4.Èç¹ûtablenameÀïûÓÐÆäËûidentityÁУ¬ÄÇô£º
select identity(int) id0,* into #temp from tablename
È¡nµ½mÌõµÄÓï¾äΪ£º
select * from #temp where id0 >=n and id0 <= m
Èç¹ûÄãÔÚÖ´ÐÐselect identity(int) id0,* into #temp from tablenameÕâÌõÓï¾äµÄʱºò±¨´í,ÄÇÊÇÒòΪÄãµÄDBÖмäµÄselect into/bulkcopyÊôÐÔûÓдò¿ªÒªÏÈÖ´ÐУº
exec sp_dboption ÄãµÄDBÃû×Ö, "select into/bulkcopy ",true
5.Èç¹û±íÀïÓÐidentityÊôÐÔ£¬ÄÇô¼òµ¥£º
select * from tablename where identitycol between n and m
±ÈÈçÒ»¸ö±íÓÐ100Ìõ¼Ç¼ÔõôȡÆäÖеĵÚ30ÖÁµÚ40Ìõ¼Ç¼??
select &nbs
Ïà¹ØÎĵµ£º
SELECT UPPER(F.TABLESPACE_NAME) "±í¿Õ¼äÃû",
D.TOT_GROOTTE_MB "±í¿Õ¼ä´óС(M)",
D.TOT_GROOTTE_MB - F.TOTAL_BYTES "ÒÑʹÓÿռä(M)",
TO_CHAR(ROUND((D.TOT_GROOTTE_MB - F.TOTAL_BYTES) / D.TOT_G ......
Ò»¡¢±¸·ÝÊý¾Ý¿â
1¡¢´ò¿ªSQLÆóÒµ¹ÜÀíÆ÷£¬ÔÚ¿ØÖÆÌ¨¸ùĿ¼ÖÐÒÀ´Îµã¿ªMicrosoft SQL Server
2¡¢SQL Server×é-->Ë«»÷´ò¿ªÄãµÄ·þÎñÆ÷-->Ë«»÷´ò¿ªÊý¾Ý¿âĿ¼
3¡¢Ñ¡ÔñÄãµÄÊý¾Ý¿âÃû³Æ£¨ÈçÂÛ̳Êý¾Ý¿âForum£©-->È»ºóµãÉÏÃæ²Ëµ¥ÖеŤ¾ß-->Ñ¡Ôñ±¸·ÝÊý¾Ý¿â
4¡¢±¸·ÝÑ¡ÏîÑ¡ÔñÍêÈ«±¸·Ý£¬Ä¿µÄÖеı¸·Ýµ½Èç¹ûÔÀ´Óз¾¶ºÍÃû³ ......
±íÖÐÖ÷¼ü±ØÐëΪ±êʶÁУ¬[ID] int IDENTITY (1,1)
Ò²¿ÉÒÔʹÓÃÁªºÏÖ÷¼ü id+id2+id3+……
1.·ÖÒ³·½°¸Ò»£º(ÀûÓÃNot InºÍSELECT TOP·ÖÒ³)
Óï¾äÐÎʽ£º
SELECT TOP 10 *
from TestTable
WHERE (ID NOT IN
(SELECT TOP 20 id
&nb ......
SQL ServerÓû§×Ô¶¨Ò庯ÊýºÍ´æ´¢¹ý³ÌÓÐÀàËÆµÄ¹¦ÄÜ£¬¶¼¿ÉÒÔ´´½¨À¦°óSQLÓï¾ä£¬´æ´¢ÔÚserverÖй©ÒÔºóʹÓá£ÕâÑùÄܹ»¼«´óµØÌá¸ß¹¤×÷ЧÂÊ£¬Í¨¹ýÒÔϵĸ÷ÖÖ×ö·¨¿ÉÒÔ¼õÉÙ±à³ÌËùÐèµÄʱ¼ä£º
¡¡¡¡ 1 ÖØ¸´Ê¹Óñà³Ì´úÂ룬¼õÉÙ±à³Ì¿ª·¢Ê±¼ä¡£
¡¡¡¡ 2 Òþ²ØSQLϸ½Ú£¬°ÑSQL·±ËöµÄ¹¤×÷Áô¸øÊý¾Ý¿â¿ª·¢ÈËÔ±£¬¶ø³ÌÐò¿ª·¢Ô±Ôò¼¯Öд¦Àí¸ß¼¶±à³Ì ......
As a response for customer's question, I decided to write about using Like Operator in Linq to SQL queries.
Starting from a simple query from Northwind Database;
var query = from c in ctx.Customers
where c.City == "London"
&nbs ......