午夜精品久久久久久久喷水 ,亚洲精品nv久久久久久久久久,午夜精品久久久久久中宇

鏁版嵁涓€鑷存€т箣鐩撅細娣卞叆瑙ｆ瀽SQL浜嬪姟闅旂綰у埆 PDF 涓嬭澆

杞澆鑷細http://java.python222.com/article/1737

鐩稿叧鎴浘錛?/strong>

涓昏鍐呭錛?/strong>

鎬у拰鎸佷箙鎬э紙ACID 灞炴€э級鐨勭壒鐐廣€傚叾涓紝闅旂鎬ф槸紜繚騫跺彂鐜涓嬪涓簨鍔′簰涓嶅共鎵扮殑鍏?/span>

閿€?/span>SQL 涓殑浜嬪姟闅旂綰у埆瀹氫箟浜嗕簨鍔″湪騫跺彂鎵ц鏃跺鏁版嵁鍙鎬х殑涓嶅悓瑕佹眰錛屼互閬垮厤璇稿

鑴忚銆佷笉鍙噸澶嶈鍜屽夠璇葷瓑騫跺彂闂銆傛湰鏂囧皢璇︾粏瑙ｉ噴 SQL 涓殑浜嬪姟闅旂綰у埆錛屽茍鎻愪緵紺轟緥

浠ｇ爜錛屼互甯姪璇昏€呮繁鍏ョ悊瑙ｈ繖涓€姒傚康銆?/span>

#### 涓€銆佷簨鍔￠殧紱葷駭鍒殑鍩烘湰姒傚康

浜嬪姟闅旂綰у埆鏄暟鎹簱綆＄悊緋葷粺鐢ㄦ潵澶勭悊騫跺彂浜嬪姟鏃舵暟鎹竴鑷存€х殑絳栫暐銆備笉鍚岀殑闅旂綰у埆瀵?/span>

搴斾笉鍚岀殑騫跺彂鎺у埗鏈哄埗錛屼粠鑰屽湪淇濊瘉鏁版嵁涓€鑷存€х殑鍚屾椂錛屼篃褰卞搷鏁版嵁搴撶殑騫跺彂鎬ц兘銆?/span>

#### 浜屻€?/span>SQL 涓殑鍥涚浜嬪姟闅旂綰у埆

1. **璇繪湭鎻愪氦錛?/span>Read Uncommitted錛?/span>**錛氭渶浣庣殑闅旂綰у埆錛屽厑璁鎬簨鍔¤鍙栨湭鎻愪氦鐨勬暟鎹€傝繖

鍙兘瀵艱嚧鑴忚銆?/span>

2. **璇誨凡鎻愪氦錛?/span>Read Committed錛?/span>**錛氬彧鍏佽浜嬪姟璇誨彇鍏朵粬浜嬪姟宸茬粡鎻愪氦鐨勬暟鎹€傚彲浠ラ伩鍏?/span>

鑴忚錛屼絾浠嶇劧鍙兘閬囧埌涓嶅彲閲嶅璇葷殑闂銆?/span>

3. **鍙噸澶嶈錛?/span>Repeatable Read錛?/span>**錛氱‘淇濆湪鍚屼竴涓簨鍔′腑錛屽嬈¤鍙栧悓涓€鏁版嵁鐨勭粨鏋滄槸涓€

鑷寸殑銆傝繖鍙互閬垮厤涓嶅彲閲嶅璇伙紝浣嗗湪鏍囧噯 SQL 涓笉淇濊瘉闃叉騫昏銆?/span>

4. **涓茶鍖栵紙Serializable錛?/span>**錛氭渶楂樼殑闅旂綰у埆錛岄€氳繃閿佸畾娑夊強鐨勬墍鏈夋暟鎹潵閬垮厤鑴忚銆佷笉

鍙噸澶嶈鍜屽夠璇匯€傝繖浼氬鑷存渶涓ユ牸鐨勫茍鍙戞帶鍒訛紝浣嗕篃鍙兘褰卞搷鎬ц兘銆?/span>

#### 涓夈€佷簨鍔￠殧紱葷駭鍒殑瀹炵幇鏈哄埗

鏁版嵁搴撶鐞嗙郴緇熼€氳繃閿佹満鍒舵垨澶氱増鏈茍鍙戞帶鍒訛紙MVCC錛夌瓑鎶€鏈疄鐜頒笉鍚岀殑浜嬪姟闅旂綰у埆銆?/span>

閿佹満鍒墮€氳繃閿佸畾鏁版嵁琛屾垨琛ㄦ潵鎺у埗璁塊棶錛岃€?nbsp;MVCC 鍒欓€氳繃淇濆瓨鏁版嵁鐨勫涓増鏈潵鍏佽闈為樆濉?/span>

璇誨彇銆?/span>

亚洲精品92内射,午夜福利院在线观看免费 ,亚洲av中文无码乱人伦在线视色,亚洲国产欧美国产综合在线,亚洲国产精品综合久久2007

鏈€鏂癑ava鍏ㄦ爤灝變笟瀹炴垬璇劇▼(鍏嶈垂)

springcloud鍒嗗竷寮忕數鍟嗙鏉€瀹炴垬璇劇▼

IDEA姘鎬箙嬋€媧?/h2>

66濂梛ava瀹炴垬璇劇▼鏃犲璺鍙?/h2>
閿嬪摜寮€濮嬫敹Java瀛﹀憳鍟︼紒

Python瀛︿範璺嚎鍥?/h2>

閿嬪摜寮€濮嬫敹Java瀛﹀憳鍟︼紒

Python瀛︿範璺嚎鍥?/h2>

鏁版嵁涓€鑷存€т箣鐩撅細娣卞叆瑙ｆ瀽SQL浜嬪姟闅旂綰у埆 PDF 涓嬭澆

Java1234瀹樻柟緹?5錛?/td>
Java1234瀹樻柟緹?5錛?/td>	838462530