oracleÅúÁ¿(batch)²Ù×÷µÄʹÓÃ
/**
* ¸üмǼ£¬Ô×Ó²Ù×÷£¬²»»ácommit
* @param sql_id
* @param condition
* @return
* @throws SQLException
*/
public boolean updateBatchSql(String sql, List<List<String>> conditions) throws SQLException {
boolean b = false;
if (sql == null || sql.trim().length() == 0) {
return b;
}
Connection conn = null;
ResultSet rs = null;
PreparedStatement pstmt = null;
//Ö´ÐÐsql
try {
conn = handler.getConnection();
pstmt = conn.prepareStatement(sql);
//Ñ»·¸³Öµ
for (List<String> condition : conditions) {
for (int i = 0; i < condition.size(); i++) {
pstmt.setString(i + 1, condition.get(i));
}
pstmt.addBatch();
}
&
Ïà¹ØÎĵµ£º
http://www.anysql.net/oracle/query_rewrite_01.html
Query Rewrite ÔÚÊý¾Ý²Ö¿âÊÇÊÇÒ»¸ö·Ç³£ÓÐÓõļ¼Êõ, TomÔÚ<<Effective Oracle by Design>>Ò»ÊéÖн«ÊµÌ廯ÊÓͼ(MView)³ÆÎªÊÇÊý¾Ý²Ö¿âµÄË÷Òý, ÕâÊÇÔÙÌùÇв»¹ýµÄÁË, ÔÚOLTPÖе±SELECTÓï¾äµÄËùÓеÄ×ֶζ¼ÔÚË÷ÒýÖÐʱ, Oracle¿ÉÒÔ²»´Ó±í¶ÁÊý¾Ý, ¶øÖ± ......
ÔÚOracleµÄQuery RewriteÖÐÖ÷ÒªÓÐÈýµã, µÚÒ»ÊÇҪʹÓÃCBO; µÚ¶þÊÇÒªÉèÖÃquery rewrite enabled²ÎÊýΪTRUE; µÚÈýÊÇÒªÏÈÔñÉèÖÃquery rewrite integrity²ÎÊýµÄÖµ(stale_tolerated, trusted, enforced). ¶ÔÓÚµÚÒ»µã, ÎÒÃÇ×îºÃanalyzeÏà¹ØµÄ±í¼°Ë÷Òý¼°MV; ¶ÔÓÚµÚ¶þµã,Õâ¸ö²ÎÊýÖ»ÓÐÁ½¸öÖµ(true, false), ºÜ¼òµ ......
ÔÚQuery RewriteÖдó¼Ò¿´µ½Õâ¸ö¼¼ÊõÀë²»¿ªÒ»Ñù¶«Î÷, ʵÌ廯ÊÓͼ, ¼ò³ÆMVIEW. ÕâÊÇOracleÔÚ8iÖÐÊ×ÏÈÍÆ³öµÄ¼¼Êõ, MVIEW³ýÁËÔÚQuery RewriteÖÐʹÓÃÍâ, »¹ÔÚMaster - Slave¸´ÖÆÖÐÓкÜÖØÒªµÄ×÷ÓÃ, ÔÚÕâ¶ùÎÒÃÇÖ÷Òª¹ØÐÄQuery RewriteÏà¹ØµÄµØ·½, OracleÔÚQuery Rewrite·½ÃæÔ½À´Ô½Ç¿ÁË, ÔÚOracle 8iÖлù±¾ÉÏÊÇText Ma ......
¿ÉÒÔ¿´µ½MVIEWÔÚQuery RewriteÖеÄÖØÒªÐÔ, ÒªÔÚʵ¼ÊÓ¦ÓÃÖÐʹÓÃ, ¾ÍµÃÖªµÀËüµÄºÜ¶à·½Ãæ, ÆäÖÐË¢ÐÂÊÇ×îÖ÷ÒªµÄ:
1, MVIEWÈÕÖ¾µÄ½¨Á¢
2, »ã×ÜÐ͵ÄMIVEWµÄË¢ÐÂ
3, JOINÀàÐ͵ÄMVIEWµÄË¢ÐÂ
4, ¸ü¸´ÔÓµÄMVIEWµÄË¢ÐÂ
5, ·ÖÇøÊ±µÄMVIEWµÄË¢ÐÂ
ÔÚÕâ¶ùÎÒÃÇÖ÷ÒªÌÖÂÛµÄÊÇÈçºÎʵÏÖFastË¢ÐÂ, ·ñÔòûÓжàÉ ......
1¡¢²é¿´±í¿Õ¼äµÄÃû³Æ¼°´óС
¡¡¡¡select t.tablespace_name, round(sum(bytes/(1024*1024)),0) ts_size
¡¡¡¡from dba_tablespaces t, dba_data_files d
¡¡¡¡where t.tablespace_name = d.tablespace_name
¡¡¡¡group by t.tablespace_name;
¡¡¡¡
¡¡¡¡2¡¢²é¿´±í¿Õ¼äÎïÀíÎļþµÄÃû³Æ¼°´óС
¡¡¡¡select tablespace_ ......