{"id":1297,"date":"2017-01-28T21:01:13","date_gmt":"2017-01-28T13:01:13","guid":{"rendered":"http:\/\/www.royalwzy.com\/?p=1297"},"modified":"2017-01-28T21:30:24","modified_gmt":"2017-01-28T13:30:24","slug":"mysql-ocp-06-%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"http:\/\/www.royalwzy.com\/?p=1297","title":{"rendered":"MySQL OCP-06-\u6570\u636e\u7c7b\u578b"},"content":{"rendered":"
—\u00a0\u6570\u636e\u7c7b\u578b:\u6982\u89c8;<\/div>\n
1.\u5728MySQL\u4e2d,\u53ef\u7528\u7684\u6570\u636e\u7c7b\u578b\u5206\u4e3a\u56db\u4e2a\u4e3b\u8981\u7c7b\u522b:<\/div>\n
\u00a0 \u00a0 1.\u6570\u503c;<\/div>\n
\u00a0 \u00a0 2.\u5b57\u7b26;<\/div>\n
\u00a0 \u00a0 3.\u4e8c\u8fdb\u5236;<\/div>\n
\u00a0 \u00a0 4.\u65f6\u95f4;<\/div>\n
2.\u5728\u6bcf\u4e2a\u7c7b\u522b\u4e2d,\u5b58\u5728\u591a\u79cd\u7279\u5b9a\u7684\u6570\u636e\u7c7b\u578b,\u8fd9\u4e9b\u6570\u636e\u7c7b\u578b\u4f7f\u7528\u7684\u5185\u5b58\u5927\u5c0f\u548c\u78c1\u76d8\u7a7a\u95f4\u5404\u4e0d\u76f8\u540c,\u56e0\u6b64\u4f1a\u5bf9\u6027\u80fd\u4ea7\u751f\u4e0d\u540c\u7684\u5f71\u54cd;<\/div>\n
3.\u5bf9\u4e8e\u5355\u4e2a\u8bb0\u5f55,\u4e3a\u5217\u9009\u62e9\u6700\u4f73\u6570\u636e\u7c7b\u578b\u6240\u4ea7\u751f\u7684\u6027\u80fd\u5f71\u54cd\u76f8\u5bf9\u8f83\u5c0f,\u4f46\u968f\u7740\u6570\u636e\u5e93\u7684\u589e\u5927,\u8fd9\u4e9b\u8f83\u5c0f\u7684\u5f71\u54cd\u53ef\u80fd\u4f1a\u6c47\u805a\u6210\u5927\u7684\u5f71\u54cd;\u5e94\u5728\u8bbe\u8ba1\u8fc7\u7a0b\u4e2d\u4e8b\u5148\u8003\u8651\u8fd9\u4e9b\u5f71\u54cd,\u4ee5\u514d\u9020\u6210\u6027\u80fd\u95ee\u9898;<\/div>\n
4.MySQL\u8fd8\u652f\u6301\u201c\u7a7a\u95f4\u6269\u5c55\u201d\u5b58\u50a8\u5f15\u64ce\u529f\u80fd;\u901a\u8fc7\u7a7a\u95f4\u6269\u5c55,\u80fd\u591f\u4ee5\u5b57\u7b26\u548c\u4e8c\u8fdb\u5236\u683c\u5f0f\u751f\u6210,\u5b58\u50a8\u548c\u5206\u6790\u5730\u7406\u7279\u5f81;<\/div>\n
5.\u6570\u636e\u7c7b\u578b\u7684ABC\u8981\u7d20:<\/div>\n
\u00a0 \u00a0 1.Appropriate(\u9002\u5f53):\u9700\u8981\u4ee5\u6700\u9002\u5408\u6570\u636e\u6240\u4ee3\u8868\u7684\u9879\u7684\u7c7b\u578b\u6765\u8868\u793a\u6570\u636e;<\/div>\n
\u00a0 \u00a0 2.Brief(\u7b80\u6d01):\u9009\u62e9\u6240\u7528\u5b58\u50a8\u7a7a\u95f4\u6700\u5c11\u7684\u6570\u636e\u7c7b\u578b\u3002\u8fd9\u53ef\u8282\u7701\u8d44\u6e90\u5e76\u63d0\u9ad8\u6027\u80fd;<\/div>\n
\u00a0 \u00a0 3.Complete(\u5b8c\u6574):\u9009\u62e9\u7684\u6570\u636e\u7c7b\u578b\u5e94\u5206\u914d\u6709\u53ef\u5b58\u50a8\u7279\u5b9a\u9879\u7684\u6700\u5927\u53ef\u80fd\u503c\u7684\u5145\u8db3\u7a7a\u95f4;<\/div>\n
<\/div>\n
—\u00a0\u521b\u5efa\u5e26\u6709\u6570\u636e\u7c7b\u578b\u7684\u8868;<\/div>\n
1.\u793a\u4f8b1:\u7b2c\u4e00\u4e2a\u793a\u4f8b\u521b\u5efa\u4e86\u4e00\u4e2a\u540d\u4e3apeople\u7684\u8868,\u8be5\u8868\u5305\u542b\u4e00\u4e2a\u540d\u4e3aid\u7684\u6574\u6570\u503c\u6570\u5b57\u5217\u548c\u4e24\u4e2a\u540d\u79f0\u5206\u522b\u4e3afirst_name\u548clast_name\u00a0\u768430\u4e2a\u5b57\u7b26\u7684\u5b57\u7b26\u4e32\u5217;<\/div>\n
2.\u793a\u4f8b2:\u7b2c\u4e8c\u4e2a\u793a\u4f8b\u8bf4\u660e\u5982\u4f55\u901a\u8fc7\u6dfb\u52a0UNSIGNED\u5c5e\u6027\u6765\u7981\u6b62\u5728id\u5217\u4e2d\u4f7f\u7528\u8d1f\u503c;<\/div>\n
<\/div>\n
—\u00a0\u6570\u503c\u6570\u636e\u7c7b\u578b;<\/div>\n
1.\u6570\u503c\u6570\u636e\u7c7b\u578b\u7c7b:<\/div>\n
\u00a0 \u00a0 1.\u6574\u6570:\u6574\u6570\u6ca1\u6709\u5c0f\u6570\u90e8\u5206;\u5373,\u6ca1\u6709\u5c0f\u6570\u4f4d\u7684\u5355\u4e2a\u6574\u6570\u503c;<\/div>\n
\u00a0 \u00a0 2.\u6d6e\u70b9\u6570(FLOAT\/DOUBLE):\u8868\u793a\u5305\u542b\u6574\u6570\u90e8\u5206,\u5c0f\u6570\u90e8\u5206\u6216\u540c\u65f6\u5305\u62ec\u4e8c\u8005\u7684\u8fd1\u4f3c\u503c\u6570\u503c;\u6b64\u7c7b\u6570\u636e\u7c7b\u578b\u4f7f\u7528\u670d\u52a1\u5668\u4e3b\u673a\u7684CPU\u6240\u7528\u7684\u672c\u673a\u4e8c\u8fdb\u5236\u6d6e\u70b9\u683c\u5f0f(IEEE\u00a0754)\u6765\u8868\u793a\u503c;\u8be5\u6570\u636e\u7c7b\u578b\u7528\u4e8e\u5b58\u50a8\u548c\u8ba1\u7b97\u4f1a\u5f88\u9ad8\u6548,\u4f46\u503c\u4f1a\u5b58\u5728\u820d\u5165\u8bef\u5dee;\u5982\u679c\u5217\u53ef\u4e3a\u7a7a,\u5219\u9ed8\u8ba4\u503c\u4e3aNULL;\u5982\u679c\u5217\u4e0d\u53ef\u4e3a\u7a7a,\u5219\u9ed8\u8ba4\u503c\u4e3a0(\u6570\u503c\u96f6);<\/div>\n
\u00a0 \u00a0 3.\u5b9a\u70b9\u6570(DECIMAL):\u5305\u542b\u6574\u6570\u90e8\u5206,\u5c0f\u6570\u90e8\u5206\u6216\u540c\u65f6\u5305\u62ec\u4e8c\u8005;DECIMAL\u5217\u4e2d\u7684\u6240\u6709\u503c\u5747\u5305\u542b\u76f8\u540c\u7684\u5c0f\u6570\u4f4d\u6570,\u5e76\u4e14\u5b8c\u5168\u6309\u7ed9\u5b9a\u65b9\u5f0f\u8fdb\u884c\u5b58\u50a8;DECIMAL\u503c\u5b58\u50a8\u8d77\u6765\u4e0d\u5982\u6d6e\u70b9\u6570\u503c\u9ad8\u6548,\u4f46DECIMAL\u503c\u6ca1\u6709\u820d\u5165\u8bef\u5dee,\u56e0\u6b64\u66f4\u52a0\u7cbe\u786e;\u901a\u5e38\u7528\u4e8e\u5b58\u50a8\u8d27\u5e01\u503c(\u5176\u4e2d\u6bcf\u4e2a\u503c\u7684\u7cbe\u5ea6\u6bd4\u5176\u5b58\u50a8\u5927\u5c0f\u66f4\u52a0\u91cd\u8981);<\/div>\n
\u00a0 \u00a0 4.BIT:BIT\u5217\u89c4\u8303\u89c4\u5b9a\u4e86\u4e00\u4e2a\u5bbd\u5ea6,\u6307\u660e\u6bcf\u4e2a\u503c\u7684\u4f4d\u6570(1\u81f364\u4f4d);<\/div>\n
2.\u201c\u7cbe\u5ea6\u201d\u548c\u201c\u8303\u56f4\u201d\u662f\u9002\u7528\u4e8e\u6d6e\u70b9\u503c\u548c\u5b9a\u70b9\u503c(\u8fd9\u4e24\u79cd\u7c7b\u578b\u53ef\u4ee5\u540c\u65f6\u5305\u542b\u6574\u6570\u90e8\u5206\u548c\u5c0f\u6570\u90e8\u5206)\u7684\u672f\u8bed:<\/div>\n
\u00a0 \u00a0 1.\u7cbe\u5ea6:\u6709\u6548\u4f4d\u6570;<\/div>\n
\u00a0 \u00a0 2.\u8303\u56f4:\u5c0f\u6570\u70b9\u53f3\u4fa7\u7684\u4f4d\u6570;<\/div>\n
TIPS:\u53ef\u4ee5\u4f7f\u7528=\u53f7\u8ddf\u6d6e\u70b9\u503c\u8fdb\u884c\u6bd4\u8f83;\u4f46\u7531\u4e8e\u53ef\u80fd\u4f1a\u51fa\u73b0\u820d\u5165\u8bef\u5dee,\u56e0\u6b64\u7ed3\u679c\u53ef\u80fd\u5e76\u4e0d\u603b\u662f\u4e0e\u9884\u671f\u4e00\u6837;<\/div>\n
<\/div>\n
—\u00a0\u5b57\u7b26\u4e32\u6570\u636e\u7c7b\u578b;<\/div>\n
1.\u8fd9\u4e9b\u7c7b\u578b\u5728\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\u6709\u6240\u4e0d\u540c:<\/div>\n
\u00a0 \u00a0 1.\u6570\u636e\u662f\u4ee5\u56fa\u5b9a\u957f\u5ea6\u683c\u5f0f\u8fd8\u662f\u53ef\u53d8\u957f\u5ea6\u683c\u5f0f\u5b58\u50a8;<\/div>\n
\u00a0 \u00a0 2.\u53ef\u5b58\u50a8\u7684\u6700\u5927\u957f\u5ea6;<\/div>\n
\u00a0 \u00a0 3.\u8be5\u7c7b\u578b\u662f\u5426\u652f\u6301\u975e\u7ed3\u6784\u5316\u5b57\u7b26\u4e32\u503c;<\/div>\n
2.\u4e3a\u5b58\u50a8\u5b57\u7b26\u4e32\u6570\u636e,MySQL\u63d0\u4f9b\u4e86\u4ee5\u4e0b\u6570\u503c\u6570\u636e\u7c7b\u578b\u5b58\u50a8\u7c7b:<\/div>\n
\u00a0 \u00a0 1.\u6587\u672c:\u7528\u4e8e\u8868\u793a\u771f\u5b9e\u7684\u5b57\u7b26\u4e32\u6570\u636e\u7c7b\u578b;\u53ef\u4ee5\u4f7f\u7528\u6b64\u7c7b\u578b\u5b58\u50a8\u975e\u7ed3\u6784\u5316\u4e14\u683c\u5f0f\u81ea\u7531\u7684\u5b57\u7b26\u4e32(\u5982\u679c\u5176\u957f\u5ea6\u7b26\u5408\u5df2\u5b9a\u4e49\u7684\u7a7a\u95f4\u91cf);<\/div>\n
\u00a0 \u00a0 2.\u6574\u6570(\u679a\u4e3e\/\u96c6\u5408):\u7528\u4e8e\u8868\u793a\u7ed3\u6784\u5316\u5b57\u7b26\u4e32\u7c7b\u578b;\u79f0\u4e3a\u201c\u7ed3\u6784\u5316\u201d\u7684\u539f\u56e0\u662f,\u5b58\u50a8\u5728\u8fd9\u4e9b\u7c7b\u578b\u7684\u5217\u4e2d\u7684\u503c\u5fc5\u987b\u901a\u8fc7\u60a8\u6240\u63d0\u4f9b\u7684\u503c\u5217\u8868\u6784\u5efa,\u4ece\u800c\u5b9a\u4e49\u6570\u636e\u7c7b\u578b;<\/div>\n
<\/div>\n
—\u00a0\u5b57\u7b26\u96c6\u548c\u6392\u5e8f\u652f\u6301;<\/div>\n
1.\u5b57\u7b26\u4e32\u5177\u6709\u4ee5\u4e0b\u7279\u5f81:<\/div>\n
\u00a0 \u00a0 1.\u5e8f\u5217\u7531\u7279\u5b9a\u5b57\u7b26\u96c6\u4e2d\u7684\u5b57\u7b26\u7ec4\u6210;<\/div>\n
\u00a0 \u00a0 2.\u591a\u5b57\u8282\u5b57\u7b26\u96c6\u4e2d\u7684\u6bcf\u4e2a\u5b57\u7b26\u6240\u9700\u7684\u5b57\u8282\u6570\u53ef\u80fd\u662f\u56fa\u5b9a\u7684,\u4e5f\u53ef\u80fd\u662f\u53ef\u53d8\u7684;<\/div>\n
\u00a0 \u00a0 3.\u6bd4\u8f83\u57fa\u4e8e\u5bf9\u5b57\u7b26\u4e32\u6240\u5173\u8054\u7684\u5b57\u7b26\u96c6\u7684\u6392\u5e8f;<\/div>\n
\u00a0 \u00a0 4.\u591a\u5b57\u8282\u5b57\u7b26\u6bd4\u8f83\u4ee5\u5b57\u7b26\u800c\u4e0d\u662f\u5b57\u8282\u4e3a\u5355\u4f4d\u6267\u884c;<\/div>\n
\u00a0 \u00a0 5.\u6392\u5e8f\u5c06\u9a8c\u8bc1\u5b57\u7b26\u7684\u5927\u5199\u7248\u672c\u548c\u5c0f\u5199\u7248\u672c\u662f\u5426\u7b49\u6548;<\/div>\n
\u00a0 \u00a0 6.\u6392\u5e8f\u5c06\u51b3\u5b9a\u540c\u4e00\u4e2a\u5b57\u7b26\u7684\u4e0d\u540c\u91cd\u97f3\u6807\u8bb0\u662f\u5426\u7b49\u6548;<\/div>\n
\u00a0 \u00a0 7.\u6392\u5e8f\u53ef\u4ee5\u4e3a\u4e8c\u8fdb\u5236,\u5176\u4e2d\u57fa\u4e8e\u6570\u503c\u5b57\u7b26\u503c\u8fdb\u884c\u6bd4\u8f83;<\/div>\n
2.MySQL\u5177\u6709\u4e00\u4e2a\u5305\u542b\u5927\u91cf\u53ef\u4f9b\u9009\u62e9\u7684\u5b57\u7b26\u96c6\u548c\u6392\u5e8f\u7684\u5217\u8868;\u9009\u62e9\u6b63\u786e\u4e0e\u5426\u4f1a\u5bf9\u6027\u80fd\u6709\u5f88\u5927\u7684\u5f71\u54cd;\u8981\u67e5\u770b\u53ef\u7528\u7684\u5b57\u7b26\u96c6:SHOW\u00a0CHARACTER\u00a0SET;<\/div>\n
3.\u4f7f\u7528\u6392\u5e8f\u9009\u62e9\u53ef\u4ee5\u4e3a\u76f8\u540c\u7684\u5b57\u7b26\u96c6\u9009\u62e9\u4e0d\u540c\u7684\u6392\u5e8f\u987a\u5e8f;\u4f8b\u5982,\u663e\u793a\u6240\u6709latin1\u5b57\u7b26\u96c6:SHOW\u00a0COLLATION\u00a0LIKE\u00a0‘latin1%’;<\/div>\n
<\/div>\n
—\u00a0\u4e8c\u8fdb\u5236\u5b57\u7b26\u4e32\u6570\u636e\u7c7b\u578b;<\/div>\n
1.\u4e0e\u5b57\u7b26\u4e32\u4e0d\u540c,\u7ec4\u6210\u6b64\u7c7b\u4e8c\u8fdb\u5236\u5b57\u7b26\u4e32\u503c\u7684\u5b57\u8282\u4e0d\u4ee3\u8868\u5b57\u7b26;\u56e0\u6b64,\u4e8c\u8fdb\u5236\u5b57\u7b26\u4e32\u6ca1\u6709\u9644\u52a0\u7684\u5b57\u7b26\u8bed\u4e49,\u800c\u4e14\u7f3a\u5c11\u5b57\u7b26\u4e32\u7c7b\u6240\u8868\u793a\u7684\u5b57\u7b26\u96c6\u548c\u6574\u7406\u4fe1\u606f;<\/div>\n
2.\u5728MySQL\u4e2d,BLOB\u4e0eTEXT\u7c7b\u578b\u975e\u5e38\u76f8\u4f3c,\u6ca1\u6709\u9644\u52a0\u7684\u5b57\u7b26\u96c6\u548c\u6392\u5e8f;<\/div>\n
<\/div>\n
—\u00a0\u65f6\u95f4\u6570\u636e\u7c7b\u578b;<\/div>\n
1.YYYY,MM,DD,hh,mm,ss\u548cuuuuuu\u5206\u522b\u8868\u793a\u201c\u5e74\u201d,\u201c\u6708\u201d,\u201c\u65e5\u201d,\u201c\u5c0f\u65f6\u201d,\u201c\u5206\u949f\u201d,\u201c\u79d2\u201d\u548c\u53ef\u9009\u7684\u201c\u79d2\u7684\u5c0f\u6570\u4f4d\u201d;<\/div>\n
2.\u901a\u8fc7\u4e3a\u8be5\u7c7b\u578b\u63d0\u4f9b\u4e00\u4e2a\u53c2\u6570,\u53ef\u58f0\u660e\u79d2\u7684\u5c0f\u6570\u4f4d(\u53ef\u9009);\u4f8b\u5982,TIME(3)\u662fTIME\u7c7b\u578b,\u5176\u4e2d\u79d2\u7684\u5c0f\u6570\u4f4d\u90e8\u5206\u6700\u591a\u53ef\u8fbe\u4e09\u4f4d;<\/div>\n
3.TIMESTAMP\u503c\u91c7\u7528UTC\u8fdb\u884c\u5b58\u50a8(\u5c06\u6839\u636e\u9700\u8981\u8f6c\u6362\u4e3a\u5f53\u5730\u65f6\u95f4\u6216\u4ece\u5f53\u5730\u65f6\u95f4\u8fdb\u884c\u8f6c\u6362),\u5176\u8303\u56f4\u4e3a\u4ece1970-01-01\u00a000:00:00.000000\u81f32038-01-19\u00a003:14:07.999999;<\/div>\n
4.\u53ef\u4ee5\u5b9a\u4e49DATETIME\u548cTIMESTAMP\u4ee5\u81ea\u52a8\u8bb0\u5f55\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4,\u800c\u4e0d\u7ba1\u5bf9\u884c\u6267\u884cINSERT\u6216UPDATE\u64cd\u4f5c\u7684\u65f6\u95f4\u4e3a\u4f55\u65f6;<\/div>\n
5.TIMESTAMP\u4e0eDATETIME\u7684\u5bf9\u6bd4:<\/div>\n
\u00a0 \u00a0 1.TIMESTAMP\u5217\u503c\u7684\u8303\u56f4\u6bd4DATETIME\u5217\u503c\u7684\u8303\u56f4\u5c0f,\u56e0\u6b64\u5b58\u50a8\u6bcf\u4e2a\u503c\u6240\u9700\u7684\u5b57\u8282\u6570\u66f4\u5c11;<\/div>\n
\u00a0 \u00a0 2.\u901a\u8fc7\u4e3a\u4e0d\u5141\u8bb8\u51fa\u73b0NULL\u7684TIMESTAMP\u6307\u5b9aNULL\u503c,\u53ef\u4ee5\u5c06\u5176\u8bbe\u7f6e\u4e3a\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4;<\/div>\n
\u4f8b\u5b50:<\/div>\n
CREATE\u00a0TABLE\u00a0t_time<\/div>\n
(<\/div>\n
\u00a0 \u00a0 id\u00a0INT\u00a0NOT\u00a0NULL,<\/div>\n
\u00a0 \u00a0 t1\u00a0TIMESTAMP\u00a0NOT\u00a0NULL\u00a0DEFAULT\u00a0CURRENT_TIMESTAMP\u00a0ON\u00a0UPDATE\u00a0CURRENT_TIMESTAMP,<\/div>\n
\u00a0 \u00a0 t2\u00a0TIMESTAMP\u00a0NOT\u00a0NULL\u00a0DEFAULT\u00a0CURRENT_TIMESTAMP,<\/div>\n
\u00a0 \u00a0 t3\u00a0TIMESTAMP\u00a0NOT\u00a0NULL\u00a0ON\u00a0UPDATE\u00a0CURRENT_TIMESTAMP<\/div>\n
);<\/div>\n
mysql>\u00a0INSERT\u00a0INTO\u00a0t_time(id)\u00a0VALUES(1);<\/div>\n
mysql>\u00a0COMMIT;<\/div>\n
mysql>\u00a0SELECT\u00a0*\u00a0FROM\u00a0t_time;<\/div>\n
+—-+———————+———————+———————+<\/div>\n
|\u00a0id\u00a0|\u00a0t1\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 |\u00a0t2\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 |\u00a0t3\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 |<\/div>\n
+—-+———————+———————+———————+<\/div>\n
|\u00a0 1\u00a0|\u00a02015-08-19\u00a014:00:42\u00a0|\u00a02015-08-19\u00a014:00:42\u00a0|\u00a00000-00-00\u00a000:00:00\u00a0|<\/div>\n
+—-+———————+———————+———————+<\/div>\n
mysql>\u00a0UPDATE\u00a0t_time\u00a0SET\u00a0t1\u00a0=\u00a0‘2000-01-01\u00a000:00:00’\u00a0WHERE\u00a0id\u00a0=\u00a01;<\/div>\n
Query\u00a0OK,\u00a01\u00a0row\u00a0affected\u00a0(0.00\u00a0sec)<\/div>\n
Rows\u00a0matched:\u00a01\u00a0 Changed:\u00a01\u00a0 Warnings:\u00a00<\/div>\n
<\/div>\n
mysql>\u00a0COMMIT;<\/div>\n
Query\u00a0OK,\u00a00\u00a0rows\u00a0affected\u00a0(0.00\u00a0sec)<\/div>\n
<\/div>\n
mysql>\u00a0SELECT\u00a0*\u00a0FROM\u00a0t_time;<\/div>\n
+—-+———————+———————+———————+<\/div>\n
|\u00a0id\u00a0|\u00a0t1\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 |\u00a0t2\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 |\u00a0t3\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 |<\/div>\n
+—-+———————+———————+———————+<\/div>\n
|\u00a0 1\u00a0|\u00a02000-01-01\u00a000:00:00\u00a0|\u00a02015-08-19\u00a014:00:42\u00a0|\u00a02015-08-19\u00a014:01:43\u00a0|<\/div>\n
+—-+———————+———————+———————+<\/div>\n
1\u00a0row\u00a0in\u00a0set\u00a0(0.00\u00a0sec)<\/div>\n
<\/div>\n
<\/div>\n
—\u00a0\u7a7a\u95f4\u6570\u636e\u7c7b\u578b;<\/div>\n
MySQL\u5b9e\u73b0\u4e86\u7531\u5f00\u653e\u5730\u7406\u7a7a\u95f4\u534f\u4f1a(Open\u00a0Geospatial\u00a0Consortium,\u00a0OGC)\u63d0\u51fa\u7684\u201c\u5305\u542b\u51e0\u4f55\u7c7b\u578b\u7684SQL\u201d\u73af\u5883\u7684\u5b50\u96c6:<\/div>\n
1.\u7528\u4e8e\u5355\u4e2a\u51e0\u4f55\u4f53\u503c:<\/div>\n
\u00a0 \u00a0 1.GEOMETRY:\u5c42\u6b21\u7ed3\u6784\u7684\u6839\u7c7b,\u4efb\u4f55\u7c7b\u578b\u7684\u503c;<\/div>\n
\u00a0 \u00a0 2.POINT:\u5750\u6807\u7a7a\u95f4\u4e2d\u7684\u5355\u4e2a\u4f4d\u7f6e;<\/div>\n
\u00a0 \u00a0 3.CURVE:\u4e00\u7ef4\u51e0\u4f55\u4f53,\u7531\u70b9\u7ec4\u6210\u7684\u5e8f\u5217;<\/div>\n
\u00a0 \u00a0 4.LINESTRING:\u70b9\u4e4b\u95f4\u5177\u6709\u7ebf\u6027\u5185\u63d2\u7684\u66f2\u7ebf;<\/div>\n
\u00a0 \u00a0 5.SURFACE:\u4e8c\u7ef4\u51e0\u4f55\u4f53;<\/div>\n
\u00a0 \u00a0 6.POLYGON:\u8868\u793a\u591a\u8fb9\u51e0\u4f55\u4f53\u7684\u5e73\u9762;<\/div>\n
2.\u7528\u4e8e\u4fdd\u5b58\u51e0\u4f55\u4f53\u503c\u7684\u96c6\u5408:<\/div>\n
\u00a0 \u00a0 1.MULTIPOINT:Point\u5143\u7d20;<\/div>\n
\u00a0 \u00a0 2.MULTICURVE:Curve\u5143\u7d20;<\/div>\n
\u00a0 \u00a0 3.MULTILINESTRING:LineString\u5143\u7d20;<\/div>\n
\u00a0 \u00a0 4.MULTISURFACE:Surface\u5143\u7d20;<\/div>\n
\u00a0 \u00a0 5.MULTIPOLYGON:Polygon\u5143\u7d20;<\/div>\n
\u00a0 \u00a0 6.GEOMETRYCOLLECTION:\u4efb\u610f\u7c7b\u578b\u7684\u51e0\u4f55\u4f53;<\/div>\n
<\/div>\n
—\u00a0\u5c06\u6570\u636e\u7c7b\u578b\u8bbe\u7f6e\u4e3aNULL;<\/div>\n
1.\u5728SQL\u4e2d,\u5bf9\u8868\u8fbe\u5f0f\u6c42\u503c\u7684\u7ed3\u679c\u53ef\u4ee5\u4e3anull;null\u503c\u662f\u4e00\u4e2a\u7279\u6b8a\u7684\u503c,\u8868\u793a\u503c\u65e0\u6cd5\u8fdb\u884c\u8ba1\u7b97\u6216\u672a\u77e5;<\/div>\n
2.\u4f55\u65f6\u4f7f\u7528NULL:\u5728\u6570\u636e\u5e93\u8bbe\u8ba1\u7684\u5f00\u59cb\u9636\u6bb5,\u5f53\u5217\u51fa\u8981\u5305\u542b\u5728\u5185\u7684\u6570\u636e\u65f6,\u53d1\u73b0\u67d0\u4e9b\u6570\u636e\u53ef\u80fd\u4e0d\u9002\u7528\u4e8e\u6240\u6709\u5217;<\/div>\n
3.\u4f55\u65f6\u4e0d\u5e94\u4f7f\u7528NULL:\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b,\u4e0d\u5e94\u5141\u8bb8\u5217\u4e2d\u4f7f\u7528null\u503c;<\/div>\n
\u00a0 \u00a0 1.\u6700\u5e38\u89c1\u7684\u60c5\u51b5\u5373\u8be5\u5217\u4e3a\u4e3b\u952e\u65f6;<\/div>\n
\u00a0 \u00a0 2.\u53e6\u4e00\u4e2a\u4f8b\u5b50\u662f:\u5f53\u5217\u5fc5\u987b\u5305\u542b\u503c\u65f6,\u6570\u636e\u5e93\u8bbe\u8ba1\u624d\u6709\u610f\u4e49;<\/div>\n
\u00a0 \u00a0 3.NULL\u503c\u4e0d\u4fdd\u5b58\u5230\u7d22\u5f15\u4e2d;<\/div>\n
<\/div>\n
—\u00a0\u521b\u5efa\u5e26\u6709\u5217\u5c5e\u6027\u7684\u8868;<\/div>\n
\u672c\u5e7b\u706f\u7247\u4e2d\u6240\u663e\u793a\u7684\u793a\u4f8b\u4e2d\u7684\u8868\u5305\u542b\u4e00\u4e2a\u4e0d\u80fd\u5305\u542bNULL\u503c\u7684UNSIGNED\u6574\u6570\u5217;\u4e00\u4e2a\u4f7f\u7528utf8\u5b57\u7b26\u96c6\u7684\u5b57\u7b26\u4e32\u5217;\u4ee5\u53ca\u4e00\u4e2a\u9ed8\u8ba4\u503c\u4e3a\u201c2013-01-01\u201d\u7684\u65e5\u671f\u5217;<\/div>\n
<\/div>\n
—\u00a0\u5217\u5c5e\u6027;<\/div>\n
—\u00a0\u9009\u62e9\u6570\u636e\u7c7b\u578b;<\/div>\n
—\u00a0\u8bfe\u540e\u7ec3\u4e60;<\/div>\n","protected":false},"excerpt":{"rendered":"

—\u00a0\u6570\u636e\u7c7b\u578b:\u6982\u89c8; 1.\u5728MySQL\u4e2d,\u53ef\u7528\u7684\u6570\u636e\u7c7b\u578b\u5206\u4e3a\u56db\u4e2a\u4e3b\u8981\u7c7b\u522b: \u00a0 \u00a0 1.\u6570\u503c; \u00a0 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21],"tags":[27,31],"class_list":["post-1297","post","type-post","status-publish","format-standard","hentry","category-mysql","tag-mysql","tag-mysql_ocp"],"_links":{"self":[{"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/posts\/1297","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1297"}],"version-history":[{"count":1,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/posts\/1297\/revisions"}],"predecessor-version":[{"id":1298,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/posts\/1297\/revisions\/1298"}],"wp:attachment":[{"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1297"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1297"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1297"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}