sqlÓï¾ä´´½¨³ÉµÇ¼
1 windowsµÇ¼ÕË»§¿Ú£ºEXEC ap_grantlogin 'windowsÓòÃû\ÓòÕË»§'
2 SQL µÇ¼ÕË»§:EXEC sp_addlogin 'ÕË»§Ãû','ÃÜÂë'
3 ´´½¨Êý¾Ý¿âÓû§:exec spgrantdbaccess 'µÇ¼ÕË»§','Êý¾Ý¿âÓû§'
¶þ ¸øÊý¾Ý¿âÓû§ÊÚȨ
grant ȨÏÞ on ±íÃû to Êý¾Ý¿âÓû§
Ïà¹ØÎĵµ£º
×ܽáÒ»ÏÂSQLÓï¾äÖÐÒýºÅ(')¡¢quotedstr()¡¢('')¡¢format()ÔÚSQLÓï¾äÖеÄÓ÷¨ÒÔ¼°SQLÓï¾äÖÐÈÕÆÚ¸ñʽµÄ±íʾ(#)¡¢('')
ÔÚDelphiÖнøÐÐ×Ö·û±äÁ¿Á¬½ÓÏà¼Óʱµ¥ÒýºÅÓÃ('''),ÓÖÒýºÅÓÃ('''')±íʾ
Ê×Ïȶ¨Òå±äÁ¿
var
AnInt:integer=123;//ΪÁË·½±ãÔڴ˶¼¸øËüÃǸ³³õÖµ¡£ËäÈ»¿ÉÄÜÔÚÒý¸³³õÖµÔÚijЩÇé¿öϲ»¶Ô
AnIntStr:string='456'; ......
ORACLE SQLÓï¾äÓÅ»¯×ܽá
1£© Ñ¡Ôñ×îÓÐЧÂʵıíÃû˳Ðò(Ö»ÔÚ»ùÓÚ¹æÔòµÄÓÅ»¯Æ÷ÖÐÓÐЧ)£º
ORACLEµÄ½âÎöÆ÷°´ÕÕ´ÓÓÒµ½×óµÄ˳Ðò´¦Àífrom×Ó¾äÖеıíÃû£¬from×Ó¾äÖÐдÔÚ×îºóµÄ±í(»ù´¡±í driving table)½«±»×îÏÈ´¦Àí£¬ÔÚfrom×Ó¾äÖаüº¬¶à¸ö±íµÄÇé¿öÏÂ,Äã±ØÐëÑ¡Ôñ¼Ç¼ÌõÊý×îÉٵıí×÷Ϊ»ù´¡±í¡£Èç¹ûÓÐ3¸öÒÔÉϵıíÁ¬½Ó²éѯ, Ä ......
1¡¢¹«Óñí±í´ïʽ (CTE) ¿ÉÒÔÈÏΪÊÇÔÚµ¥¸ö SELECT¡¢INSERT¡¢UPDATE¡¢DELETE »ò CREATE VIEW Óï¾äµÄÖ´Ðз¶Î§ÄÚ¶¨ÒåµÄÁÙʱ½á¹û¼¯¡£CTE ÓëÅÉÉú±íÀàËÆ£¬¾ßÌå±íÏÖÔÚ²»´æ´¢Îª¶ÔÏ󣬲¢ÇÒÖ»ÔÚ²éѯÆÚ¼äÓÐЧ¡£ÓëÅÉÉú±íµÄ²»Í¬Ö®´¦ÔÚÓÚ£¬CTE ¿É×ÔÒýÓ㬻¹¿ÉÔÚͬһ²éѯÖÐÒýÓöà´Î¡£
¡¡¡¡CTE ¿ÉÓÃÓÚ£º
¡¡¡¡´´½¨µÝ¹é²éѯ¡£ÓйØÏêϸР......
Select * from tableName
exec('select * from tableName')
exec sp_executesql N'select * from tableName' -- Çë×¢Òâ×Ö·û´®Ç°Ò»¶¨Òª¼ÓN
2:×Ö¶ÎÃû£¬±íÃû£¬Êý¾Ý¿âÃûÖ®Àà×÷Ϊ±äÁ¿Ê±£¬±ØÐëÓö¯Ì¬SQL
declare @fname varchar(20)
set @fname = 'FiledName'
Select @fname from tableName -- ´íÎó,²»»áÌáʾ´í ......
ÏÂÃæÊÇÎÒËѼ¯µÄһЩ¾«ÃîµÄSQLÓï¾ä¡£
˵Ã÷£º¸´ÖƱí(Ö»¸´Öƽṹ,Ô´±íÃû£ºa бíÃû£ºb)
SQL: select * into b from a where 1<>1
˵Ã÷£º¿½±´±í(¿½±´Êý¾Ý,Ô´±íÃû£ºa Ä¿±ê±íÃû£ºb)
SQL: insert into b(a, b, c) select d,e,f from b;
˵Ã÷£ºÏÔʾÎÄÕ¡¢Ìá½»È˺Í×îºó»Ø¸´Ê±¼ä
SQL: select a.title,a.username,b.adddat ......