Èí¼þ²âÊÔÖг£ÓõÄSQLÓï¾ä
²éѯÓï¾ä
Óï·¨¸ñʽ£º
SELECT
[ALL | DISTINCT | DISTINCTROW ]
[HIGH_PRIORITY]
[STRAIGHT_JOIN]
[SQL_SMALL_RESULT] [SQL_BIG_RESULT] [SQL_
[SQL_CACHE | SQL_NO_CACHE] [SQL_CALC_FOUN
select_expr [, select_expr ...]
[from table_references
[WHERE where_condition]
[GROUP BY {col_name | expr | position}
[ASC | DESC], ... [WITH ROLLUP]]
[HAVING where_condition]
[ORDER BY {col_name | expr | position}
[ASC | DESC], ...]
[LIMIT {[offset,] row_count | row_count OFF
[PROCEDURE procedure_name(argument_list)]
[INTO OUTFILE 'file_name' export_options
| INTO DUMPFILE 'file_name'
| INTO var_name [, var_name]]
[FOR UPDATE | LOCK IN SHARE MODE]]
³£ÓþÙÀý
--²éѯmember±íÖÐËùÓеĻáÔ±¼Ç¼
SELECT * from member;
ÆäÖГ*”ºÅ±íʾÏÔʾ·ûºÏÌõ¼þµÄ¼Ç¼µÄËùÓÐ×Ö¶Î
ÔÚÊý¾Ý¿âÖд洢ÀàÐÍΪÎı¾µÄ×ֶβéѯ
--²éѯmember±íÖÐÐÕÃû½ÐÕÅÈýµÄ»áÔ±
SELECT * from member WHERE name = 'ÕÅÈý';
--²éѯmember±íÖÐËùÓÐÐÕÕŵĻáÔ±
SELECT * from member WHERE name like ‘ÕÅ%’;
ÆäÖГ%”±íʾÈÎÒâ×Ö·û¶¼·ûºÏÌõ¼þ¡£¼´Ö»ÓÐÂú×ãÐÕÃûÖеÚ1¸ö×Ö·ûÊÇ“ÕÅ”¾ÍÂú×ã²éѯÌõ¼þ
--²éѯmember±íÖÐËùÓÐÃû×Ö°üº¬“Èý”µÄ»áÔ±
SELECT * from member WHERE name like ‘%Èý%’;
ÓÉÓÚ“Èý”×Öǰºó¶¼º¬Óаٷֺœ%”£¬Õâ¾Í±íʾ“Èý”×ÖÇ°ÃæºÍ“Èý”×ÖºóÃæ²»¹ÜÊÇÈκÎ×Ö·û¶¼Âú×ã²éѯÌõ¼þ£¬¼´Ê¹“Èý”×ÖǰºóûÓÐ×Ö·ûÒ²·ûºÏÌõ¼þ
ÔÚÊý¾Ý¿âÖÐÄêÁä´æ´¢ÎªÊý×ÖÀàÐ͵Ä×ֶβéѯ
--²éѯmember±íÖÐÄêÁäµÈÓÚ18µÄ»áÔ±
SELECT * from member WHERE age = 18;
--²éѯmember±íÖÐÄêÁä´óÓÚµÈÓÚ18µÄ»áÔ±
SELECT * from member WHERE age >= 18;
Ïà¹ØÎĵµ£º
×öÊý¾Ý¿âµ÷ÓÅ£¬Ò»¸ö¼òµ¥µÄtip¾ÍʹÐÔÄÜÌáÉýÒ»´ó¿éʱ£¬±»°ïÖúµÄÈË×ÔÈ»ÊǸßÐ˶øÇҸм¤£¬ÎÒÒ²ÊÇÂúÐÄ»¶Ï²¡£ÓÃËùѧ°ïÖúÁËËûÈË£¬Ò²ËµÃ÷»¹ÊÇÓÐÒ»¼¼Ö®³¤µÄ£¬ÓÐÒ»ÃÅÄܹ»Ñø»î×Ô¼ºµÄÊÖÒÕ¡£Ò²ËãÊÇÊÖÒÕÈ˰¡¡£
ͬÊÂÈÃÎÒ°ïÖúÓÅ»¯£¬ÔÚslow query logÀï·¢ÏÖÓÐÁ½¸öSQLÖ´ÐеĴÎÊý×î¶à£¬²¢ÇÒÿ´Î¶¼ÔÚÁ½ÃëÒÔÉÏ¡£ÓÃexplain¿´ÁË£¬Ò²Î´·¢ÏÖË÷ÒýʹÓ÷ ......
if(query.getIsScrapAlert()!=null&&query.getIsScrapAlert()==1){
//criteria.add(Expression.sql(" add_months(this_.D_RECEIVE_DATE,this_.N_DEPRECIABLE_LIFE*12)<add_months(sysdate,-3) "));
criteria.add(Expression.sql(" ((add_months(this_. ......
eclipse ¹ØÁª sql server µÄJDBCÎÊÌâ
±à³ÌÔËÐкóÌáʾ£º
java.lang.ClassNotFoundException: com.microsoft.jdbc.sqlserver.SQLServerDriver
ÉÏÍø²éÁË£¬ÓеÄ˵ÔÚ»·¾³±äÁ¿ÀïµÄclasspathÌí¼Ó JDBCÀïµÄ3¸öjarÎļþ¾Í¿ÉÒÔ£¬µ«ÊÇʹÓúó»¹ÊDz»ÐС£
ºóÀ´²ÅÖªµÀ½â¾ö·½·¨£º
°ü×ÊÔ´¹ÜÀíÆ÷-->°üÃûÓÒ¼ü"¹¹½¨Â·¾¶"--> ......
MS SQL SERVERÊý¾Ý¿â±¸·ÝBAK»¹ÔÊý¾Ý¿â
ÓÉÓÚÊý¾ÝÎó²Ù×÷£¬Ïë»Ö¸´Ò»Ï²Ù×÷ǰµÄÊý¾Ý¡£ÓÚÊÇн¨ÁËÒ»¸ö¿ÕÊý¾Ý¿â¡£Ê¹ÓÃÔÀ´µÄ±¸·ÝÎļþ bak¡£À´»Ö¸´³ÉÒ»¸öеÄÊý¾Ý¿â¡£ÕâÑù¾Í¿ÉÒÔÊÖ¶¯»Ö¸´Êý¾ÝÁË¡£
µ«ÊÇÔÚ»Ö¸´Ð½¨Êý¾Ý¿âµÄʱºò×ÜÊDz»³É¹¦£¬Ìáʾ´íÎóÈëÏ£º
The backup set holds a backup of a database other than the existing ......