{"id":341,"date":"2011-11-23T21:40:22","date_gmt":"2011-11-23T13:40:22","guid":{"rendered":"https:\/\/blog.rexdf.org\/?p=341"},"modified":"2011-11-23T21:40:22","modified_gmt":"2011-11-23T13:40:22","slug":"oracle%e7%9a%84%e9%94%81%e6%9c%ba%e5%88%b6%e5%bd%92%e7%ba%b3%e6%80%bb%e7%bb%93","status":"publish","type":"post","link":"https:\/\/blog.rexdf.org\/en\/2011\/11\/oracle%e7%9a%84%e9%94%81%e6%9c%ba%e5%88%b6%e5%bd%92%e7%ba%b3%e6%80%bb%e7%bb%93\/","title":{"rendered":"Oracle\u7684\u9501\u673a\u5236\u5f52\u7eb3\u603b\u7ed3"},"content":{"rendered":"<p>\u9501\u662f\u9632\u6b62\u5728\u4e24\u4e2a\u4e8b\u52a1\u64cd\u4f5c\u540c\u4e00\u4e2a\u6570\u636e\u6e90\uff08\u8868\u6216\u884c\uff09\u65f6\u4ea4\u4e92\u7834\u574f\u6570\u636e\u7684\u4e00\u79cd\u673a\u5236\u3002Oracle\u91c7\u7528\u5c01\u9501\u6280\u672f\u4fdd\u8bc1\u5e76\u53d1\u64cd\u4f5c\u7684\u53ef\u4e32\u884c\u6027\u3002Oracle\u7684\u9501\u5206\u4e3a\u4e24\u5927\u7c7b\uff1a\u6570\u636e\u9501\uff08\u4e5f\u79f0DML\u9501\uff09\u548c\u5b57\u5178\u9501\u3002\u5b57\u5178\u9501\u662fOracle DBMS\u5185\u90e8\u7528\u4e8e\u5bf9\u5b57\u5178\u8868\u7684\u5c01\u9501\u3002\u5b57\u5178\u9501\u5305\u62ec\u8bed\u6cd5\u5206\u6790\u9501\u548cDDL\u9501\uff0c\u7531DBMS\u5728\u5fc5\u8981\u7684\u65f6\u5019\u81ea\u52a8\u52a0\u9501\u548c\u91ca\u653e\u9501\uff0c\u7528\u6237\u65e0\u673a\u63a7\u5236\u3002<\/p>\n<p>Oracle\u4e3b\u8981\u63d0\u4f9b\u4e865\u79cd\u6570\u636e\u9501\uff1a\u5171\u4eab\u9501\uff08Share Table Lock\uff0c\u7b80\u79f0S\u9501\uff09\u3001\u6392\u5b83\u9501\uff08Exclusive Table Lock\uff0c\u7b80\u79f0X\u9501\uff09\u3001\u884c\u7ea7\u9501\uff08Row Share Table Lock\uff0c\u7b80\u79f0RS\u9501\uff09\u3001\u884c\u7ea7\u6392\u5b83\u9501\uff08Row Exclusive Table Lock\uff0c\u7b80\u79f0RX\u9501\uff09\u548c\u5171\u4eab\u884c\u7ea7\u6392\u5b83\u9501\uff08Share Row Exclusive Table Lock\uff0c\u7b80\u79f0SRX\u9501\uff09\u3002\u5176\u5c01\u9501\u7c92\u5ea6\u5305\u62ec\u884c\u7ea7\u548c\u8868\u7ea7\u3002<\/p>\n<p>1. \u5171\u4eab\u9501\uff08Share Table Lock\uff0cS\uff09\uff1a<br \/>\n\u52a0\u9501\u8bed\u6cd5\uff1aLock Table TableName In Share Mode;<br \/>\n\u5141\u8bb8\u7684\u64cd\u4f5c\uff1a\u4e00\u4e2a\u5171\u4eab\u9501\u7531\u4e00\u4e2a\u4e8b\u52a1\u63a7\u5236\uff0c\u4ec5\u5141\u8bb8\u5176\u5b83\u4e8b\u52a1\u67e5\u8be2\u88ab\u9501\u5b9a\u7684\u8868\u3002\u4e00\u4e2a\u6709\u6548\u7684\u5171\u4eab\u9501\u660e\u786e\u5730\u7528Select \u2026 For update\u5f62\u5f0f\u9501\u5b9a\u884c\uff0c\u6216\u6267\u884cLock Table TableName In Share Mode\u8bed\u6cd5\u9501\u5b9a\u6574\u4e2a\u8868\uff0c\u4e0d\u5141\u8bb8\u88ab\u5176\u5b83\u4e8b\u52a1\u66f4\u65b0\u3002\u5141\u8bb8\u591a\u4e2a\u4e8b\u52a1\u5728\u540c\u4e00\u4e2a\u8868\u4e0a\u52a0\u5171\u4eab\u9501\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u4e0d\u5141\u8bb8\u5728\u8be5\u8868\u4e0a\u52a0\u9501\u7684\u4e8b\u52a1\u66f4\u65b0\u8868\uff08\u5373\u4f7f\u6709\u4e00\u4e2a\u4e8b\u52a1\u63a7\u5236\u7684\u662f\u5f62\u5982Select Row \u2026 for update\u8fd9\u6837\u884c\u9501\u4e5f\u662f\u4e0d\u88ab\u5141\u8bb8\u7684\uff09\u3002\u56e0\u6b64\uff0c\u4ec5\u6709\u4e00\u4e2a\u4e8b\u52a1\u7684\u4e00\u4e2a\u5171\u4eab\u9501\u53ef\u4ee5\u66f4\u65b0\u8be5\u8868\u5982\u679c\u5176\u5b83\u4e8b\u52a1\u4e5f\u6709\u76f8\u540c\u7684\u4e8b\u52a1\u5728\u8be5\u8868\u4e0a\u7684\u8bdd\u3002<br \/>\n\u7981\u6b62\u7684\u64cd\u4f5c\uff1a\u4e00\u4e2a\u5171\u4eab\u9501\u7531\u4e00\u4e2a\u4e8b\u52a1\u6765\u63a7\u5236\uff0c\u9632\u6b62\u5176\u5b83\u4e8b\u52a1\u66f4\u65b0\u8be5\u8868\u6216\u6267\u884c\u4e0b\u9762\u7684\u8bed\u53e5\uff1a<br \/>\nLOCK TABLE TableName IN SHARE ROW EXCLUSIVE MODE;<br \/>\nLOCK TABLE TableName IN ROW EXCLUSIVE MODE;<br \/>\n2. \u6392\u5b83\u9501\uff08Exclusive Table Lock\uff0cX\uff09\uff1a<\/p>\n<p>\u6392\u5b83\u9501\u662f\u5728\u9501\u673a\u5236\u4e2d\u9650\u5236\u6700\u591a\u7684\u4e00\u79cd\u9501\u7c7b\u578b\uff0c\u5141\u8bb8\u52a0\u6392\u5b83\u9501\u7684\u4e8b\u52a1\u72ec\u81ea\u63a7\u5236\u5bf9\u8868\u7684\u5199\u6743\u9650\u3002<br \/>\n\u52a0\u9501\u8bed\u6cd5\uff1aLock Table TableName In Exclusive Mode;<br \/>\n\u5141\u8bb8\u7684\u64cd\u4f5c\uff1a\u5728\u4e00\u4e2a\u8868\u4e2d\u53ea\u80fd\u6709\u4e00\u4e2a\u4e8b\u52a1\u5bf9\u8be5\u8868\u5b9e\u884c\u6392\u5b83\u9501\uff0c\u6392\u5b83\u9501\u4ec5\u5141\u8bb8\u5176\u5b83\u7684\u4e8b\u52a1\u67e5\u8be2\u8be5\u8868\u3002<br \/>\n\u7981\u6b62\u7684\u64cd\u4f5c\uff1a\u62e5\u6709\u6392\u5916\u9501\u7684\u4e8b\u52a1\u7981\u6b62\u5176\u5b83\u4e8b\u52a1\u6267\u884c\u5176\u5b83\u4efb\u4f55DML\u7c7b\u578b\u7684\u8bed\u53e5\u6216\u5728\u8be5\u8868\u4e0a\u52a0\u4efb\u4f55\u5176\u5b83\u7c7b\u578b\u7684\u9501\u3002<br \/>\n\u5b9a\u4e49\u6392\u5b83\u9501\u7684\u8bed\u6cd5\uff1a<br \/>\nLOCK TABLE TableName IN EXCLUSIVE MODE;<br \/>\n3. \u884c\u7ea7\u9501\uff08Row Share Table Lock\uff0cRS\uff09\uff1a<\/p>\n<p>\u4e00\u4e2a\u884c\u7ea7\u9501\uff08\u6709\u65f6\u79f0\u4e3aSubshare Table Lock\uff0c\u7b80\u79f0SS\uff0c\u5b50\u5171\u4eab\u9501\uff09\u9700\u8981\u8be5\u4e8b\u52a1\u5728\u88ab\u9501\u5b9a\u884c\u7684\u8868\u4e0a\u7528update\u7684\u5f62\u5f0f\u52a0\u9501\u3002\u5f53\u6709\u4e0b\u9762\u8bed\u53e5\u88ab\u6267\u884c\u7684\u65f6\u5019\u884c\u7ea7\u9501\u81ea\u52a8\u52a0\u5728\u64cd\u4f5c\u7684\u8868\u4e0a\u3002<br \/>\nSELECT . . . FROM TableName. . . FOR UPDATE OF . . . ;<br \/>\nLOCK TABLE TableName IN ROW SHARE MODE;<br \/>\n\u884c\u7ea7\u9501\uff08Row Share Table Lock\uff09\u5728\u9501\u7c7b\u578b\u4e2d\u662f\u9650\u5236\u6700\u5c11\u7684\uff0c\u4e5f\u662f\u5728\u8868\u7684\u5e76\u53d1\u7a0b\u5ea6\u4e2d\u4f7f\u7528\u7a0b\u5ea6\u6700\u9ad8\u7684\u3002<br \/>\n\u5141\u8bb8\u7684\u64cd\u4f5c\uff1a\u884c\u7ea7\u5171\u4eab\u9501\u7531\u4e00\u4e2a\u4e8b\u52a1\u63a7\u5236\uff0c\u5141\u8bb8\u5176\u5b83\u4e8b\u52a1\u67e5\u8be2\u3001\u63d2\u5165\u3001\u66f4\u65b0\u3001\u5220\u9664\u6216\u540c\u65f6\u5728\u540c\u4e00\u5f20\u8868\u4e0a\u9501\u5b9a\u884c\u3002\u56e0\u6b64\u5176\u5b83\u4e8b\u52a1\u53ef\u4ee5\u540c\u65f6\u5728\u540c\u4e00\u5f20\u8868\u4e0a\u5f97\u5230\u884c\u7ea7\u9501\u3001\u5171\u4eab\u884c\u7ea7\u6392\u5b83\u9501\u3001\u884c\u7ea7\u6392\u5b83\u9501\u3001\u6392\u5b83\u9501\u3002\u53c2\u89c1\u6570\u636e\u9501\u7684\u76f8\u5bb9\u77e9\u9635\u56fe<br \/>\n\u7981\u6b62\u7684\u64cd\u4f5c\uff1a\u62e5\u6709\u884c\u7ea7\u9501\u7684\u4e8b\u52a1\u4e0d\u5141\u8bb8\u5176\u5b83\u4e8b\u52a1\u6267\u884c\u6392\u5b83\u9501\uff0c\u5373\uff1a<br \/>\nLock Table TableName In Exclusive Mode;<br \/>\n4. \u884c\u7ea7\u6392\u5b83\u9501\uff08Row Exclusive Table Lock\uff0cRX\uff09\uff1a<\/p>\n<p>\u884c\u7ea7\u6392\u5b83\u9501\uff08\u4ea6\u79f0\u4e3aSubexclusive Table Lock\uff0c\u7b80\u79f0SX\uff0c\u5b50\u6392\u5b83\u9501\uff09\u901a\u5e38\u9700\u8981\u4e8b\u52a1\u62e5\u6709\u7684\u9501\u5728\u8868\u4e0a\u88ab\u66f4\u65b0\u4e00\u884c\u6216\u591a\u884c\u3002\u5f53\u6709\u4e0b\u9762\u8bed\u53e5\u88ab\u6267\u884c\u7684\u65f6\u5019\u884c\u7ea7\u6392\u5b83\u9501\u88ab\u52a0\u5728\u64cd\u4f5c\u7684\u8868\u4e0a\u3002<br \/>\nINSERT INTO TableName. . . ;<br \/>\nUPDATE TableName. . . ;<br \/>\nDELETE FROM TableName. . . ;<br \/>\nLOCK TABLE TableName IN ROW EXCLUSIVE MODE;<br \/>\n\u884c\u7ea7\u6392\u5b83\u9501\u6bd4\u884c\u7ea7\u9501\u7a0d\u5fae\u591a\u4e00\u4e9b\u9650\u5236\u3002<br \/>\n\u5141\u8bb8\u7684\u64cd\u4f5c\uff1a\u5728\u6570\u636e\u9501\u7684\u76f8\u5bb9\u77e9\u9635\u56fe\u5f88\u5bb9\u6613\u770b\u51fa\u884c\u7ea7\u6392\u5b83\u9501\u7531\u4e00\u4e2a\u4e8b\u52a1\u62e5\u6709\u5141\u8bb8\u5176\u5b83\u4e8b\u52a1\u6267\u884c\u67e5\u8be2\u3001\u4fee\u6539\u3001\u63d2\u5165\u3001\u5220\u9664\u6216\u540c\u65f6\u5728\u540c\u4e00\u5f20\u8868\u4e0a\u9501\u5b9a\u884c\u3002\u6267\u6709\u884c\u7ea7\u6392\u5b83\u9501\u7684\u4e8b\u52a1\u5141\u8bb8\u5176\u5b83\u4e8b\u52a1\u5728\u540c\u4e00\u5f20\u8868\u4e0a\u540c\u65f6\u5f97\u5230\u5171\u4eab\u9501\u548c\u884c\u7ea7\u6392\u5b83\u9501\u3002<br \/>\n\u7981\u6b62\u7684\u64cd\u4f5c\uff1a\u884c\u7ea7\u6392\u5b83\u9501\u7531\u4e00\u4e2a\u4e8b\u52a1\u62e5\u6709\u9632\u6b62\u5176\u5b83\u4e8b\u52a1\u624b\u52a8\u9501\u5b9a\u8868\u6765\u6392\u9664\u5176\u5b83\u4e8b\u52a1\u7684\u8bfb\u5199\u6743\u3002\u56e0\u6b64\uff0c\u5176\u5b83\u4e8b\u52a1\u4e0d\u5141\u8bb8\u5728\u540c\u4e00\u5f20\u8868\u4e0a\u4f7f\u7528\u4ee5\u4e0b\u7684\u8bed\u53e5\u6765\u6267\u884c\u9501\u4e8b\u52a1\u3002<br \/>\nLOCK TABLE table IN SHARE MODE;<br \/>\nLOCK TABLE table IN SHARE EXCLUSIVE MODE;<br \/>\nLOCK TABLE table IN EXCLUSIVE MODE<br \/>\n5. \u5171\u4eab\u884c\u7ea7\u6392\u5b83\u9501\uff08Share Row Exclusive Table Lock\uff0cSRX\uff09\uff1a<\/p>\n<p>\u5171\u4eab\u884c\u7ea7\u6392\u5b83\u9501\u6709\u65f6\u4e5f\u79f0\u5171\u4eab\u5b50\u6392\u5b83\u9501\uff08Share Subexclusive Table Lock\uff0cSSX\uff09\uff0c\u5b83\u6bd4\u5171\u4eab\u9501\u6709\u66f4\u591a\u9650\u5236\u3002\u5b9a\u4e49\u5171\u4eab\u884c\u7ea7\u6392\u5b83\u9501\u7684\u8bed\u6cd5\u4e3a\uff1a<br \/>\nLock Table TableName In Share Row Exclusive Mode;<br \/>\n\u5141\u8bb8\u7684\u64cd\u4f5c\uff1a\u4ec5\u5141\u8bb8\u4e00\u4e2a\u4e8b\u52a1\u5728\u67d0\u4e00\u65f6\u523b\u5f97\u5230\u884c\u7ea7\u6392\u5b83\u9501\u3002\u62e5\u6709\u884c\u7ea7\u6392\u5b83\u9501\u4e8b\u52a1\u5141\u8bb8\u5176\u5b83\u4e8b\u52a1\u5728\u88ab\u9501\u5b9a\u7684\u8868\u4e0a\u6267\u884c\u67e5\u8be2\u6216\u4f7f\u7528Select \u2026 From TableName For update\u2026\u6765\u51c6\u786e\u5728\u9501\u5b9a\u884c\u800c\u4e0d\u80fd\u66f4\u65b0\u884c\u3002<br \/>\n\u7981\u6b62\u7684\u64cd\u4f5c\uff1a\u62e5\u6709\u884c\u7ea7\u6392\u5b83\u9501\u7684\u4e8b\u52a1\u4e0d\u5141\u8bb8\u5176\u5b83\u4e8b\u52a1\u6709\u9664\u5171\u4eab\u9501\u5916\u7684\u5176\u5b83\u5f62\u5f0f\u7684\u9501\u52a0\u5728\u540c\u4e00\u5f20\u8868\u4e0a\u6216\u66f4\u65b0\u8be5\u8868\u3002\u5373\u4e0b\u9762\u7684\u8bed\u53e5\u662f\u4e0d\u88ab\u5141\u8bb8\u7684\uff1a<br \/>\nLOCK TABLE TableName IN SHARE MODE;<br \/>\nLOCK TABLE TableName IN SHARE ROW EXCLUSIVE MODE;<br \/>\nLOCK TABLE TableName IN ROW EXCLUSIVE MODE;<br \/>\nLOCK TABLE TableName IN EXCLUSIVE MODE;<\/p>\n<p>DML\u8bed\u53e5\u83b7\u5f97\u7684DML\u81ea\u52a8\u9501\uff08Oracle\u9690\u542b\u9501\uff09<br \/>\nDML\u81ea\u52a8\u9501\u7684\u76f8\u5bb9\u77e9\u9635\u56fe\uff1a<br \/>\nX\uff1a\u6392\u5b83\u9501\u3001RS\uff1a\u884c\u7ea7\u5171\u4eab\u9501\u3001RX\uff1a\u884c\u7ea7\u6392\u5b83\u9501\u3001S\u3001\u5171\u4eab\u9501\u3001RSX\uff1a\u884c\u7ea7\u5171\u4eab\u6392\u5b83\u9501<\/p>\n<p>DML\u8bed\u53e5 \u6709\u884c\u7ea7\u9501 \u9501\u7c7b\u578b<br \/>\nSELECT &#8230; FROM table<br \/>\nINSERT INTO table &#8230; X RX<br \/>\nUPDATE table &#8230; X RX<br \/>\nDELETE FROM table &#8230; X RX<br \/>\nSELECT &#8230; FROM table &#8230; FOR UPDATE OF &#8230; X RS<br \/>\nLOCK TABLE table IN &#8230;<br \/>\nROW SHARE MODE RS<br \/>\nROW EXCLUSIVE MODE RX<br \/>\nSHARE MODE S<br \/>\nSHARE EXCLUSIVE MODE SRX<br \/>\nEXCLUSIVE MODE X<\/p>\n<p>\u6570\u636e\u5b57\u5178\u4e2d\u4e0e\u9501\u6709\u5173\u7684\u8868\u6216\u89c6\u56fe<br \/>\nV_$LOCKED_OBJECT<br \/>\nV_$LOCKS_WITH_COLLISIONS<br \/>\nV_$LOCK_ACTIVITY<br \/>\nV_$LOCK_ELEMENT<br \/>\nV_$_LOCK<br \/>\nDBMS_LOCK<br \/>\nV$DLM_ALL_LOCKS<br \/>\nV$DLM_LOCKS<br \/>\nV$ENQUEUE_LOCK<br \/>\nV$GLOBAL_BLOCKED_LOCKS<br \/>\nV$LOCK<br \/>\nV$LOCKED_OBJECT<br \/>\nV$LOCKS_WITH_COLLISIONS<br \/>\nV$LOCK_ACTIVITY<br \/>\nV$LOCK_ELEMENT<br \/>\nV$_LOCK<br \/>\n\u89e3\u9501\u53caKill Session:<br \/>\n\u4f7f\u7528\u4e0b\u9762\u7684\u8bed\u6cd5\u67e5\u51fa\u9501\u5e76\u6740\u6389Session\u3002<br \/>\nSELECT A.SID,A.SERIAL#,A.USERNAME,B.TYPE FROM V$SESSION A,V$LOCK B WHERE A.SID=B.SID;<br \/>\nALTER SYSTEM KILL SESSION &#8216;SID,SERIAL#&#8217;;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9501\u662f\u9632\u6b62\u5728\u4e24\u4e2a\u4e8b\u52a1\u64cd\u4f5c\u540c\u4e00\u4e2a\u6570\u636e\u6e90\uff08\u8868\u6216\u884c\uff09\u65f6\u4ea4\u4e92\u7834\u574f\u6570\u636e\u7684\u4e00\u79cd\u673a\u5236\u3002Oracle\u91c7\u7528\u5c01\u9501\u6280\u672f\u4fdd\u8bc1\u5e76\u53d1\u64cd\u4f5c\u7684\u53ef\u4e32\u884c\u6027\u3002Oracle\u7684\u9501\u5206\u4e3a\u4e24\u5927\u7c7b\uff1a\u6570\u636e\u9501\uff08\u4e5f\u79f0DML\u9501\uff09\u548c\u5b57\u5178\u9501\u3002\u5b57\u5178\u9501\u662fOracle DBMS\u5185\u90e8\u7528\u4e8e\u5bf9\u5b57\u5178\u8868\u7684\u5c01\u9501\u3002\u5b57\u5178\u9501\u5305\u62ec\u8bed\u6cd5\u5206\u6790\u9501\u548cDDL\u9501\uff0c\u7531DBMS\u5728\u5fc5\u8981\u7684\u65f6\u5019\u81ea\u52a8\u52a0\u9501\u548c\u91ca\u653e\u9501\uff0c\u7528\u6237\u65e0\u673a\u63a7\u5236\u3002 Oracle\u4e3b\u8981\u63d0\u4f9b\u4e865\u79cd\u6570\u636e\u9501\uff1a\u5171\u4eab\u9501\uff08Share Table Lock\uff0c\u7b80\u79f0S\u9501\uff09\u3001\u6392\u5b83\u9501\uff08Exclusive Table Lock\uff0c\u7b80\u79f0X\u9501\uff09\u3001\u884c\u7ea7\u9501\uff08Row Share Table Lock\uff0c\u7b80\u79f0RS\u9501\uff09\u3001\u884c\u7ea7\u6392\u5b83\u9501\uff08Row Exclusive Table Lock\uff0c\u7b80\u79f0RX\u9501\uff09\u548c\u5171\u4eab\u884c\u7ea7\u6392\u5b83\u9501\uff08Share Row Exclusive Table Lock\uff0c\u7b80\u79f0SRX\u9501\uff09\u3002\u5176\u5c01\u9501\u7c92\u5ea6\u5305\u62ec\u884c\u7ea7\u548c\u8868\u7ea7\u3002 1. \u5171\u4eab\u9501\uff08Share Table Lock\uff0cS\uff09\uff1a \u52a0\u9501\u8bed\u6cd5\uff1aLock Table TableName In Share Mode; \u5141\u8bb8\u7684\u64cd\u4f5c\uff1a\u4e00\u4e2a\u5171\u4eab\u9501\u7531\u4e00\u4e2a\u4e8b\u52a1\u63a7\u5236\uff0c\u4ec5\u5141\u8bb8\u5176\u5b83\u4e8b\u52a1\u67e5\u8be2\u88ab\u9501\u5b9a\u7684\u8868\u3002\u4e00\u4e2a\u6709\u6548\u7684\u5171\u4eab\u9501\u660e\u786e\u5730\u7528Select \u2026 For update\u5f62\u5f0f\u9501\u5b9a\u884c\uff0c\u6216\u6267\u884cLock Table TableName In Share Mode\u8bed\u6cd5\u9501\u5b9a\u6574\u4e2a\u8868\uff0c\u4e0d\u5141\u8bb8\u88ab\u5176\u5b83\u4e8b\u52a1\u66f4\u65b0\u3002\u5141\u8bb8\u591a\u4e2a\u4e8b\u52a1\u5728\u540c\u4e00\u4e2a\u8868\u4e0a\u52a0\u5171\u4eab\u9501\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u4e0d\u5141\u8bb8\u5728\u8be5\u8868\u4e0a\u52a0\u9501\u7684\u4e8b\u52a1\u66f4\u65b0\u8868\uff08\u5373\u4f7f\u6709\u4e00\u4e2a\u4e8b\u52a1\u63a7\u5236\u7684\u662f\u5f62\u5982Select Row \u2026 for update\u8fd9\u6837\u884c\u9501\u4e5f\u662f\u4e0d\u88ab\u5141\u8bb8\u7684\uff09\u3002\u56e0\u6b64\uff0c\u4ec5\u6709\u4e00\u4e2a\u4e8b\u52a1\u7684\u4e00\u4e2a\u5171\u4eab\u9501\u53ef\u4ee5\u66f4\u65b0\u8be5\u8868\u5982\u679c\u5176\u5b83\u4e8b\u52a1\u4e5f\u6709\u76f8\u540c\u7684\u4e8b\u52a1\u5728\u8be5\u8868\u4e0a\u7684\u8bdd\u3002 &hellip; <a href=\"https:\/\/blog.rexdf.org\/en\/2011\/11\/oracle%e7%9a%84%e9%94%81%e6%9c%ba%e5%88%b6%e5%bd%92%e7%ba%b3%e6%80%bb%e7%bb%93\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[6],"tags":[50],"class_list":["post-341","post","type-post","status-publish","format-standard","hentry","category-oracle","tag-oracle-2"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/blog.rexdf.org\/en\/wp-json\/wp\/v2\/posts\/341","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.rexdf.org\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.rexdf.org\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.rexdf.org\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.rexdf.org\/en\/wp-json\/wp\/v2\/comments?post=341"}],"version-history":[{"count":0,"href":"https:\/\/blog.rexdf.org\/en\/wp-json\/wp\/v2\/posts\/341\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.rexdf.org\/en\/wp-json\/wp\/v2\/media?parent=341"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.rexdf.org\/en\/wp-json\/wp\/v2\/categories?post=341"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.rexdf.org\/en\/wp-json\/wp\/v2\/tags?post=341"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}