{"id":856,"date":"2025-02-18T18:38:28","date_gmt":"2025-02-18T10:38:28","guid":{"rendered":"https:\/\/eve2333.top\/?p=856"},"modified":"2025-02-18T18:38:28","modified_gmt":"2025-02-18T10:38:28","slug":"mysql%e6%95%b0%e6%8d%ae%e5%ba%93%e5%85%a5%e9%97%a8%e5%88%b0%e5%a4%a7%e8%9b%87%e5%b0%9a%e7%a1%85%e8%b0%b7%e5%ae%8b%e7%ba%a2%e5%ba%b7%e8%80%81%e5%b8%88%e7%ac%94%e8%ae%b0-%e5%9f%ba%e7%a1%80%e7%af%87-pa-8","status":"publish","type":"post","link":"https:\/\/eve2333.top\/?p=856","title":{"rendered":"MySQL\u6570\u636e\u5e93\u5165\u95e8\u5230\u5927\u86c7\u5c1a\u7845\u8c37\u5b8b\u7ea2\u5eb7\u8001\u5e08\u7b14\u8bb0 \u57fa\u7840\u7bc7 part 11"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">&nbsp;\u7b2c11\u7ae0_\u6570\u636e\u5904\u7406\u4e4b\u589e\u5220\u6539<\/h1>\n\n\n\n<p>\u9996\u5148\u5f97\u5148\u6709\u4e00\u4e2a\u8868\uff1a&nbsp;<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#0. \u50a8\u5907\u5de5\u4f5c\nUSE atguigudb;\n\nCREATE TABLE IF NOT EXISTS emp1(\nid INT,\n`name` VARCHAR(15),\nhire_date DATE,\nsalary DOUBLE(10,2)\n);\n\nDESC emp1;\n\nSELECT *\nFROM emp1;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">1.\u589e\u52a0\u6570\u636e&nbsp;<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>#\u65b9\u5f0f1\uff1a\u4e00\u6761\u4e00\u6761\u7684\u6dfb\u52a0\u6570\u636e\n\n# \u2460 \u6ca1\u6709\u6307\u660e\u6dfb\u52a0\u7684\u5b57\u6bb5\n#\u6b63\u786e\u7684\nINSERT INTO emp1\nVALUES (1,'Tom','2000-12-21',3400); #\u6ce8\u610f\uff1a\u4e00\u5b9a\u8981\u6309\u7167\u58f0\u660e\u7684\u5b57\u6bb5\u7684\u5148\u540e\u987a\u5e8f\u6dfb\u52a0\n#\u9519\u8bef\u7684\nINSERT INTO emp1\nVALUES (2,3400,'2000-12-21','Jerry');\n\n# \u2461 \u6307\u660e\u8981\u6dfb\u52a0\u7684\u5b57\u6bb5 \uff08\u63a8\u8350\uff09\nINSERT INTO emp1(id,hire_date,salary,`name`)\nVALUES(2,'1999-09-09',4000,'Jerry');\n# \u8bf4\u660e\uff1a\u6ca1\u6709\u8fdb\u884c\u8d4b\u503c\u7684hire_date \u7684\u503c\u4e3a null\nINSERT INTO emp1(id,salary,`name`)\nVALUES(3,4500,'shk');\n\n# \u2462 \u540c\u65f6\u63d2\u5165\u591a\u6761\u8bb0\u5f55 \uff08\u63a8\u8350\uff09\nINSERT INTO emp1(id,NAME,salary)\nVALUES\n(4,'Jim',5000),\n(5,'\u5f20\u4fca\u6770',5500);<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u4e00\u4e2a\u540c\u65f6\u63d2\u5165\u591a\u884c\u8bb0\u5f55\u7684INSERT\u8bed\u53e5\u7b49\u540c\u4e8e\u591a\u4e2a\u5355\u884c\u63d2\u5165\u7684INSERT\u8bed\u53e5\uff0c\u4f46\u662f\u591a\u884c\u7684INSERT\u8bed\u53e5 \u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u6548\u7387\u66f4\u9ad8\u3002\u56e0\u4e3aMySQL\u6267\u884c\u5355\u6761INSERT\u8bed\u53e5\u63d2\u5165\u591a\u884c\u6570\u636e\u6bd4\u4f7f\u7528\u591a\u6761INSERT\u8bed\u53e5\u5feb\uff0c\u6240\u4ee5\u5728\u63d2\u5165\u591a\u6761\u8bb0\u5f55\u65f6\u6700\u597d\u9009\u62e9\u4f7f\u7528\u5355\u6761INSERT\u8bed\u53e5\u7684\u65b9\u5f0f\u63d2\u5165\u3002&nbsp;<\/p>\n<\/blockquote>\n\n\n\n<pre class=\"wp-block-code\"><code>#\u65b9\u5f0f2\uff1a\u5c06\u67e5\u8be2\u7ed3\u679c\u63d2\u5165\u5230\u8868\u4e2d\n\nSELECT * FROM emp1;\n\nINSERT INTO emp1(id,NAME,salary,hire_date)\n#\u67e5\u8be2\u8bed\u53e5\nSELECT employee_id,last_name,salary,hire_date  # \u67e5\u8be2\u7684\u5b57\u6bb5\u4e00\u5b9a\u8981\u4e0e\u6dfb\u52a0\u5230\u7684\u8868\u7684\u5b57\u6bb5\u4e00\u4e00\u5bf9\u5e94\nFROM employees\nWHERE department_id IN (70,60);\n\nDESC emp1;\nDESC employees;<\/code><\/pre>\n\n\n\n<p><strong># \u8bf4\u660e\uff1aemp1\u8868\u4e2d\u8981\u6dfb\u52a0\u6570\u636e\u7684\u5b57\u6bb5\u7684\u957f\u5ea6\u4e0d\u80fd\u4f4e\u4e8eemployees\u8868\u4e2d\u67e5\u8be2\u7684\u5b57\u6bb5\u7684\u957f\u5ea6\u3002<br># \u5982\u679cemp1\u8868\u4e2d\u8981\u6dfb\u52a0\u6570\u636e\u7684\u5b57\u6bb5\u7684\u957f\u5ea6\u4f4e\u4e8eemployees\u8868\u4e2d\u67e5\u8be2\u7684\u5b57\u6bb5\u7684\u957f\u5ea6\u7684\u8bdd\uff0c\u5c31\u6709\u6dfb\u52a0\u4e0d\u6210\u529f\u7684\u98ce\u9669\u3002<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. \u66f4\u65b0\u6570\u636e<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>#2. \u66f4\u65b0\u6570\u636e \uff08\u6216\u4fee\u6539\u6570\u636e\uff09\n# UPDATE .... SET .... WHERE ...\n# \u53ef\u4ee5\u5b9e\u73b0\u6279\u91cf\u4fee\u6539\u6570\u636e\u7684\u3002\u4f7f\u7528 WHERE \u5b50\u53e5\u6307\u5b9a\u9700\u8981\u66f4\u65b0\u7684\u6570\u636e\u3002 \u5982\u679c\u7701\u7565 WHERE \u5b50\u53e5\uff0c\n# \u5219\u8868\u4e2d\u7684\u6240\u6709\u6570\u636e\u90fd\u5c06\u88ab\u66f4\u65b0\u3002\n\nUPDATE emp1\nSET hire_date = CURDATE()\nWHERE id = 5;\n\nSELECT * FROM emp1;\n\n#\u540c\u65f6\u4fee\u6539\u4e00\u6761\u6570\u636e\u7684\u591a\u4e2a\u5b57\u6bb5\nUPDATE emp1\nSET hire_date = CURDATE(),salary = 6000\nWHERE id = 4;<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>#\u9898\u76ee\uff1a\u5c06\u8868\u4e2d\u59d3\u540d\u4e2d\u5305\u542b\u5b57\u7b26a\u7684\u63d0\u85aa20%\nUPDATE emp1\nSET salary = salary * 1.2\nWHERE NAME LIKE '%a%';\n\n#\u4fee\u6539\u6570\u636e\u65f6\uff0c\u662f\u53ef\u80fd\u5b58\u5728\u4e0d\u6210\u529f\u7684\u60c5\u51b5\u7684\u3002\uff08\u53ef\u80fd\u662f\u7531\u4e8e\u7ea6\u675f\u7684\u5f71\u54cd\u9020\u6210\u7684\uff09\nUPDATE employees\nSET department_id = 10000\nWHERE employee_id = 102;<\/code><\/pre>\n\n\n\n<p><strong>\u53ef\u4ee5\u4e00\u6b21\u66f4\u65b0\u591a\u6761\u6570\u636e\u3002 \u5982\u679c\u9700\u8981\u56de\u6eda\u6570\u636e\uff0c\u9700\u8981\u4fdd\u8bc1\u5728DML\u524d\uff0c\u8fdb\u884c\u8bbe\u7f6e\uff1aSET AUTOCOMMIT = FALSE;<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4. MySQL8\u65b0\u7279\u6027\uff1a\u8ba1\u7b97\u5217<\/h2>\n\n\n\n<p>\u4ec0\u4e48\u53eb\u8ba1\u7b97\u5217\u5462\uff1f\u7b80\u5355\u6765\u8bf4\u5c31\u662f\u67d0\u4e00\u5217\u7684\u503c\u662f\u901a\u8fc7\u522b\u7684\u5217\u8ba1\u7b97\u5f97\u6765\u7684\u3002\u4f8b\u5982\uff0ca\u5217\u503c\u4e3a1\u3001b\u5217\u503c\u4e3a2\uff0cc\u5217 \u4e0d\u9700\u8981\u624b\u52a8\u63d2\u5165\uff0c\u5b9a\u4e49a+b\u7684\u7ed3\u679c\u4e3ac\u7684\u503c\uff0c\u90a3\u4e48c\u5c31\u662f\u8ba1\u7b97\u5217\uff0c\u662f\u901a\u8fc7\u522b\u7684\u5217\u8ba1\u7b97\u5f97\u6765\u7684\u3002<\/p>\n\n\n\n<p>\u5728MySQL 8.0\u4e2d\uff0cCREATE TABLE \u548c ALTER TABLE \u4e2d\u90fd\u652f\u6301\u589e\u52a0\u8ba1\u7b97\u5217\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>USE atguigudb;\n\nCREATE TABLE test1(\na INT,\nb INT,\nc INT GENERATED ALWAYS AS (a + b) VIRTUAL  #\u5b57\u6bb5c\u5373\u4e3a\u8ba1\u7b97\u5217\n);\n\nINSERT INTO test1(a,b)\nVALUES(10,20);\n\nSELECT * FROM test1;\n\nUPDATE test1\nSET a = 100;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">3. \u5220\u9664\u6570\u636e<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>#3. \u5220\u9664\u6570\u636e DELETE FROM .... WHERE....\n\nDELETE FROM emp1\nWHERE id = 1;\n\n#\u5728\u5220\u9664\u6570\u636e\u65f6\uff0c\u4e5f\u6709\u53ef\u80fd\u56e0\u4e3a\u7ea6\u675f\u7684\u5f71\u54cd\uff0c\u5bfc\u81f4\u5220\u9664\u5931\u8d25\nDELETE FROM departments\nWHERE department_id = 50;\n\n#\u5c0f\u7ed3\uff1aDML\u64cd\u4f5c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6267\u884c\u5b8c\u4ee5\u540e\u90fd\u4f1a\u81ea\u52a8\u63d0\u4ea4\u6570\u636e\u3002\n# \u5982\u679c\u5e0c\u671b\u6267\u884c\u5b8c\u4ee5\u540e\u4e0d\u81ea\u52a8\u63d0\u4ea4\u6570\u636e\uff0c\u5219\u9700\u8981\u4f7f\u7528 SET autocommit = FALSE.<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">DDL\u548cDML\u7684\u7efc\u5408\u6848\u4f8b<\/h2>\n\n\n\n<p><a href=\"https:\/\/www.bilibili.com\/video\/BV1iq4y1u7vj?spm_id_from=333.788.player.switch&amp;vd_source=b31958e33027799323b8b7d77ae181d4&amp;p=57\" target=\"_blank\"  rel=\"nofollow\" >57-DDL\u548cDML\u7684\u7efc\u5408\u6848\u4f8b_\u54d4\u54e9\u54d4\u54e9_bilibili<\/a><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#5.\u7efc\u5408\u6848\u4f8b\n# 1\u3001\u521b\u5efa\u6570\u636e\u5e93test01_library\nCREATE DATABASE IF NOT EXISTS test01_library CHARACTER SET 'utf8';\n\nUSE test01_library;\n\n# 2\u3001\u521b\u5efa\u8868 books\uff0c\u8868\u7ed3\u6784\u5982\u4e0b\uff1a\nCREATE TABLE IF NOT EXISTS books(\nid INT,\n`name` VARCHAR(50),\n`authors` VARCHAR(100),\nprice FLOAT,\npubdate YEAR,\nnote VARCHAR(100),\nnum INT\n);\n\nDESC books;\n\nSELECT * FROM books;<\/code><\/pre>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" height=\"261\" width=\"540\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/393d3087670b4a8a84758db7c7e6b998.png\" alt=\"\"><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># 3\u3001\u5411books\u8868\u4e2d\u63d2\u5165\u8bb0\u5f55\n\n# 1\uff09\u4e0d\u6307\u5b9a\u5b57\u6bb5\u540d\u79f0\uff0c\u63d2\u5165\u7b2c\u4e00\u6761\u8bb0\u5f55\nINSERT INTO books\nVALUES(1,'Tal of AAA','Dickes',23,'1995','novel',11);\n# 2\uff09\u6307\u5b9a\u6240\u6709\u5b57\u6bb5\u540d\u79f0\uff0c\u63d2\u5165\u7b2c\u4e8c\u8bb0\u5f55\nINSERT INTO books(id,NAME,AUTHORS,price,pubdate,note,num)\nVALUES(2,'EmmaT','Jane lura',35,'1993','joke',22);\n# 3\uff09\u540c\u65f6\u63d2\u5165\u591a\u6761\u8bb0\u5f55\uff08\u5269\u4e0b\u7684\u6240\u6709\u8bb0\u5f55\uff09\nINSERT INTO books(id,NAME,AUTHORS,price,pubdate,note,num)\nVALUES\n(3,'Story of Jane','Jane Tim',40,2001,'novel',0),\n(4,'Lovey Day','George Byron',20,2005,'novel',30),\n(5,'Old land','Honore Blade',30,2010,'Law',0),\n(6,'The Battle','Upton Sara',30,1999,'medicine',40),\n(7,'Rose Hood','Richard haggard',28,2008,'cartoon',28);<\/code><\/pre>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" height=\"270\" width=\"595\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/b229ae1161d3478f9f6e583847e303a3.png\" alt=\"\"><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># 4\u3001\u5c06\u5c0f\u8bf4\u7c7b\u578b(novel)\u7684\u4e66\u7684\u4ef7\u683c\u90fd\u589e\u52a05\u3002\nUPDATE books\nSET price = price + 5\nWHERE note = 'novel';\n\n# 5\u3001\u5c06\u540d\u79f0\u4e3aEmmaT\u7684\u4e66\u7684\u4ef7\u683c\u6539\u4e3a40\uff0c\u5e76\u5c06\u8bf4\u660e\u6539\u4e3adrama\u3002\nUPDATE books\nSET price = 40,note = 'drama'\nWHERE NAME = 'EmmaT';\n\n# 6\u3001\u5220\u9664\u5e93\u5b58\u4e3a0\u7684\u8bb0\u5f55\u3002\nDELETE FROM books\nWHERE num = 0;\n\n# 7\u3001\u7edf\u8ba1\u4e66\u540d\u4e2d\u5305\u542ba\u5b57\u6bcd\u7684\u4e66\nSELECT NAME\nFROM books\nWHERE NAME LIKE '%a%';\n\n# 8\u3001\u7edf\u8ba1\u4e66\u540d\u4e2d\u5305\u542ba\u5b57\u6bcd\u7684\u4e66\u7684\u6570\u91cf\u548c\u5e93\u5b58\u603b\u91cf\nSELECT COUNT(*),SUM(num)\nFROM books\nWHERE NAME LIKE '%a%';\n\n# 9\u3001\u627e\u51fa\u201cnovel\u201d\u7c7b\u578b\u7684\u4e66\uff0c\u6309\u7167\u4ef7\u683c\u964d\u5e8f\u6392\u5217\n\nSELECT NAME,note,price\nFROM books\nWHERE note = 'novel'\nORDER BY price DESC;\n\n# 10\u3001\u67e5\u8be2\u56fe\u4e66\u4fe1\u606f\uff0c\u6309\u7167\u5e93\u5b58\u91cf\u964d\u5e8f\u6392\u5217\uff0c\u5982\u679c\u5e93\u5b58\u91cf\u76f8\u540c\u7684\u6309\u7167note\u5347\u5e8f\u6392\u5217\nSELECT *\nFROM books\nORDER BY num DESC,note ASC;\n\n\n# 11\u3001\u6309\u7167note\u5206\u7c7b\u7edf\u8ba1\u4e66\u7684\u6570\u91cf\nSELECT note,COUNT(*)\nFROM books\nGROUP BY note;\n\n# 12\u3001\u6309\u7167note\u5206\u7c7b\u7edf\u8ba1\u4e66\u7684\u5e93\u5b58\u91cf\uff0c\u663e\u793a\u5e93\u5b58\u91cf\u8d85\u8fc730\u672c\u7684\nSELECT note,SUM(num)\nFROM books\nGROUP BY note\nHAVING SUM(num) &gt; 30;\n\n# 13\u3001\u67e5\u8be2\u6240\u6709\u56fe\u4e66\uff0c\u6bcf\u9875\u663e\u793a5\u672c\uff0c\u663e\u793a\u7b2c\u4e8c\u9875\nSELECT *\nFROM books\nLIMIT 5,5;\n\n# 14\u3001\u6309\u7167note\u5206\u7c7b\u7edf\u8ba1\u4e66\u7684\u5e93\u5b58\u91cf\uff0c\u663e\u793a\u5e93\u5b58\u91cf\u6700\u591a\u7684\nSELECT note,SUM(num) sum_num\nFROM books\nGROUP BY note\nORDER BY sum_num DESC\nLIMIT 0,1;\n\n# 15\u3001\u67e5\u8be2\u4e66\u540d\u8fbe\u523010\u4e2a\u5b57\u7b26\u7684\u4e66\uff0c\u4e0d\u5305\u62ec\u91cc\u9762\u7684\u7a7a\u683c\nSELECT CHAR_LENGTH(REPLACE(NAME,' ',''))\nFROM books;\n\nSELECT NAME\nFROM books\nWHERE CHAR_LENGTH(REPLACE(NAME,' ','')) &gt;= 10;\n\n# 16\u3001\u67e5\u8be2\u4e66\u540d\u548c\u7c7b\u578b\uff0c\u5176\u4e2dnote\u503c\u4e3anovel\u663e\u793a\u5c0f\u8bf4\uff0claw\u663e\u793a\u6cd5\u5f8b\uff0cmedicine\u663e\u793a\u533b\u836f\uff0c\n#cartoon\u663e\u793a\u5361\u901a\uff0cjoke\u663e\u793a\u7b11\u8bdd\nSELECT NAME \"\u4e66\u540d\",note,CASE note WHEN 'novel' THEN '\u5c0f\u8bf4'\n\t\t\t\t  WHEN 'law' THEN '\u6cd5\u5f8b'\n\t\t\t\t  WHEN 'medicine' THEN '\u533b\u836f'\n\t\t\t\t  WHEN 'cartoon' THEN '\u5361\u901a'\n\t\t\t\t  WHEN 'joke' THEN '\u7b11\u8bdd'\n\t\t\t\t  ELSE '\u5176\u4ed6'\n\t\t\t\t  END \"\u7c7b\u578b\"\nFROM books;\n\n\n# 17\u3001\u67e5\u8be2\u4e66\u540d\u3001\u5e93\u5b58\uff0c\u5176\u4e2dnum\u503c\u8d85\u8fc730\u672c\u7684\uff0c\u663e\u793a\u6ede\u9500\uff0c\u5927\u4e8e0\u5e76\u4f4e\u4e8e10\u7684\uff0c\n#\u663e\u793a\u7545\u9500\uff0c\u4e3a0\u7684\u663e\u793a\u9700\u8981\u65e0\u8d27\nSELECT NAME AS \"\u4e66\u540d\",num AS \"\u5e93\u5b58\", CASE WHEN num &gt; 30 THEN '\u6ede\u9500'\n\t\t\t\t\t  WHEN num &gt; 0 AND num &lt; 10 THEN '\u7545\u9500'\n\t\t\t\t\t  WHEN num = 0 THEN '\u65e0\u8d27'\n\t\t\t\t\t  ELSE '\u6b63\u5e38'\n\t\t\t\t\t  END \"\u663e\u793a\u72b6\u6001\"\nFROM books;\n\n# 18\u3001\u7edf\u8ba1\u6bcf\u4e00\u79cdnote\u7684\u5e93\u5b58\u91cf\uff0c\u5e76\u5408\u8ba1\u603b\u91cf\nSELECT IFNULL(note,'\u5408\u8ba1\u5e93\u5b58\u603b\u91cf') AS note,SUM(num)\nFROM books\nGROUP BY note WITH ROLLUP;\n\n# 19\u3001\u7edf\u8ba1\u6bcf\u4e00\u79cdnote\u7684\u6570\u91cf\uff0c\u5e76\u5408\u8ba1\u603b\u91cf\nSELECT IFNULL(note,'\u5408\u8ba1\u603b\u91cf') AS note,COUNT(*)\nFROM books\nGROUP BY note WITH ROLLUP;\n\n# 20\u3001\u7edf\u8ba1\u5e93\u5b58\u91cf\u524d\u4e09\u540d\u7684\u56fe\u4e66\nSELECT *\nFROM books\nORDER BY num DESC\nLIMIT 0,3;\n\n# 21\u3001\u627e\u51fa\u6700\u65e9\u51fa\u7248\u7684\u4e00\u672c\u4e66\nSELECT *\nFROM books\nORDER BY pubdate ASC\nLIMIT 0,1;\n\n# 22\u3001\u627e\u51fanovel\u4e2d\u4ef7\u683c\u6700\u9ad8\u7684\u4e00\u672c\u4e66\nSELECT *\nFROM books\nWHERE note = 'novel'\nORDER BY price DESC\nLIMIT 0,1;\n\n# 23\u3001\u627e\u51fa\u4e66\u540d\u4e2d\u5b57\u6570\u6700\u591a\u7684\u4e00\u672c\u4e66\uff0c\u4e0d\u542b\u7a7a\u683c\n\nSELECT *\nFROM books\nORDER BY CHAR_LENGTH(REPLACE(NAME,' ','')) DESC\nLIMIT 0,1;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">&nbsp;\u8bfe\u540e\u7ec3\u4e60<\/h2>\n\n\n\n<p><a href=\"https:\/\/www.bilibili.com\/video\/BV1iq4y1u7vj?spm_id_from=333.788.player.switch&amp;vd_source=b31958e33027799323b8b7d77ae181d4&amp;p=58\" target=\"_blank\"  rel=\"nofollow\" >58-\u7b2c11\u7ae0\u589e\u5220\u6539\u8bfe\u540e\u7ec3\u4e60_\u54d4\u54e9\u54d4\u54e9_bilibili<\/a><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#\u7b2c11\u7ae0_\u6570\u636e\u5904\u7406\u4e4b\u589e\u5220\u6539\u7684\u8bfe\u540e\u7ec3\u4e60\n#\u7ec3\u4e601\uff1a\n#1. \u521b\u5efa\u6570\u636e\u5e93dbtest11\nCREATE DATABASE IF NOT EXISTS dbtest11 CHARACTER SET 'utf8';\n\n#2. \u8fd0\u884c\u4ee5\u4e0b\u811a\u672c\u521b\u5efa\u8868my_employees\nUSE dbtest11;\n\nCREATE TABLE my_employees(\n\tid INT(10),\n\tfirst_name VARCHAR(10),\n\tlast_name VARCHAR(10),\n\tuserid VARCHAR(10),\n\tsalary DOUBLE(10,2)\n);\n\nCREATE TABLE users(\n\tid INT,\n\tuserid VARCHAR(10),\n\tdepartment_id INT\n);\n#3.\u663e\u793a\u8868my_employees\u7684\u7ed3\u6784\n\nDESC my_employees;\n\nDESC users;\n\n#4.\u5411my_employees\u8868\u4e2d\u63d2\u5165\u4e0b\u5217\u6570\u636e\nID\tFIRST_NAME\tLAST_NAME\tUSERID\t\tSALARY\n1\tpatel\t\tRalph\t\tRpatel\t\t895\n2\tDancs\t\tBetty\t\tBdancs\t\t860\n3\tBiri\t\tBen\t\tBbiri\t\t1100\n4\tNewman\t\tChad\t\tCnewman\t\t750\n5\tRopeburn\tAudrey\t\tAropebur\t1550\n\nINSERT INTO my_employees\nVALUES(1,'patel','Ralph','Rpatel',895);\n\nINSERT INTO my_employees VALUES\n(2,'Dancs','Betty','Bdancs',860),\n(3,'Biri','Ben','Bbiri',1100),\n(4,'Newman','Chad','Cnewman',750),\n(5,'Ropeburn','Audrey','Aropebur',1550);\n\nSELECT * FROM my_employees;\n\nDELETE FROM my_employees;\n\n#\u65b9\u5f0f2\uff1a\nINSERT INTO my_employees\nSELECT 1,'patel','Ralph','Rpatel',895 UNION ALL\nSELECT 2,'Dancs','Betty','Bdancs',860 UNION ALL\nSELECT 3,'Biri','Ben','Bbiri',1100 UNION ALL\nSELECT 4,'Newman','Chad','Cnewman',750 UNION ALL\nSELECT 5,'Ropeburn','Audrey','Aropebur',1550;\n\t\t\t\n#5.\u5411users\u8868\u4e2d\u63d2\u5165\u6570\u636e\n1\tRpatel\t\t10\n2\tBdancs\t\t10\n3\tBbiri\t\t20\n4\tCnewman\t\t30\n5\tAropebur\t40\nINSERT INTO users VALUES\n(1,'Rpatel',10),\n(2,'Bdancs',10),\n(3,'Bbiri',20),\n(4,'Cnewman',30),\n(5,'Aropebur',40)\n\nSELECT * FROM users;\n\n\n\n#6. \u5c063\u53f7\u5458\u5de5\u7684last_name\u4fee\u6539\u4e3a\u201cdrelxer\u201d\nUPDATE my_employees\nSET last_name = 'drelxer'\nWHERE id = 3;\n\n#7. \u5c06\u6240\u6709\u5de5\u8d44\u5c11\u4e8e900\u7684\u5458\u5de5\u7684\u5de5\u8d44\u4fee\u6539\u4e3a1000\nUPDATE my_employees\nSET salary = 1000\nWHERE salary &lt; 900;\n\n#8. \u5c06userid\u4e3aBbiri\u7684users\u8868\u548cmy_employees\u8868\u7684\u8bb0\u5f55\u5168\u90e8\u5220\u9664\n\n#\u65b9\u5f0f1\uff1a\nDELETE FROM my_employees\nWHERE userid = 'Bbiri';\n\nDELETE FROM users\nWHERE userid = 'Bbiri';\n\n#\u65b9\u5f0f2\uff1a\n\nDELETE m,u\nFROM my_employees m\nJOIN users u\nON m.userid = u.userid\nWHERE m.userid = 'Bbiri';\n\nSELECT * FROM my_employees;\nSELECT * FROM users;\n\n#9. \u5220\u9664my_employees\u3001users\u8868\u6240\u6709\u6570\u636e\nDELETE FROM my_employees;\nDELETE FROM users;\n\n#10. \u68c0\u67e5\u6240\u4f5c\u7684\u4fee\u6b63\nSELECT * FROM my_employees;\nSELECT * FROM users;\n\n#11. \u6e05\u7a7a\u8868my_employees\nTRUNCATE TABLE my_employees;\n##########################################\n#\u7ec3\u4e602\uff1a\n# 1. \u4f7f\u7528\u73b0\u6709\u6570\u636e\u5e93dbtest11\nUSE dbtest11;\n\n# 2. \u521b\u5efa\u8868\u683cpet\nCREATE TABLE pet(\nNAME VARCHAR(20),\nOWNER VARCHAR(20),\nspecies VARCHAR(20),\nsex CHAR(1),\nbirth YEAR,\ndeath YEAR\n);\n\nDESC pet;\n\n# 3. \u6dfb\u52a0\u8bb0\u5f55\nINSERT INTO pet VALUES\n('Fluffy','harold','Cat','f','2003','2010'),\n('Claws','gwen','Cat','m','2004',NULL),\n('Buffy',NULL,'Dog','f','2009',NULL),\n('Fang','benny','Dog','m','2000',NULL),\n('bowser','diane','Dog','m','2003','2009'),\n('Chirpy',NULL,'Bird','f','2008',NULL);\n\nSELECT *\nFROM pet;\n\n# 4. \u6dfb\u52a0\u5b57\u6bb5:\u4e3b\u4eba\u7684\u751f\u65e5owner_birth DATE\u7c7b\u578b\u3002\nALTER TABLE pet\nADD owner_birth DATE;\n\n# 5. \u5c06\u540d\u79f0\u4e3aClaws\u7684\u732b\u7684\u4e3b\u4eba\u6539\u4e3akevin\nUPDATE pet\nSET OWNER = 'kevin'\nWHERE NAME = 'Claws' AND species = 'Cat';\n\n# 6. \u5c06\u6ca1\u6709\u6b7b\u7684\u72d7\u7684\u4e3b\u4eba\u6539\u4e3aduck\nUPDATE pet\nSET OWNER = 'duck'\nWHERE death IS NULL AND species = 'Dog';\n\n# 7. \u67e5\u8be2\u6ca1\u6709\u4e3b\u4eba\u7684\u5ba0\u7269\u7684\u540d\u5b57\uff1b\nSELECT NAME\nFROM pet\nWHERE OWNER IS NULL;\n\n# 8. \u67e5\u8be2\u5df2\u7ecf\u6b7b\u4e86\u7684cat\u7684\u59d3\u540d\uff0c\u4e3b\u4eba\uff0c\u4ee5\u53ca\u53bb\u4e16\u65f6\u95f4\uff1b\nSELECT NAME,OWNER,death\nFROM pet\nWHERE death IS NOT NULL;\n\n# 9. \u5220\u9664\u5df2\u7ecf\u6b7b\u4ea1\u7684\u72d7\nDELETE FROM pet\nWHERE death IS NOT NULL \nAND species = 'Dog';\n\n# 10. \u67e5\u8be2\u6240\u6709\u5ba0\u7269\u4fe1\u606f\nSELECT * \nFROM pet;\n\n##################################\n#\u7ec3\u4e603\uff1a\n# 1. \u4f7f\u7528\u5df2\u6709\u7684\u6570\u636e\u5e93dbtest11\nUSE dbtest11;\n# 2. \u521b\u5efa\u8868employee\uff0c\u5e76\u6dfb\u52a0\u8bb0\u5f55\nCREATE TABLE employee(\nid INT,\nNAME VARCHAR(15),\nsex CHAR(1),\ntel VARCHAR(25),\naddr VARCHAR(35),\nsalary DOUBLE(10,2)\n\n);\n\nINSERT INTO employee VALUES\n(10001,'\u5f20\u4e00\u4e00','\u7537','13456789000','\u5c71\u4e1c\u9752\u5c9b',1001.58),\n(10002,'\u5218\u5c0f\u7ea2','\u5973','13454319000','\u6cb3\u5317\u4fdd\u5b9a',1201.21),\n(10003,'\u674e\u56db','\u7537','0751-1234567','\u5e7f\u4e1c\u4f5b\u5c71',1004.11),\n(10004,'\u5218\u5c0f\u5f3a','\u7537','0755-5555555','\u5e7f\u4e1c\u6df1\u5733',1501.23),\n(10005,'\u738b\u8273','\u7537','020-1232133','\u5e7f\u4e1c\u5e7f\u5dde',1405.16);\n\nSELECT * FROM employee;\n\n# 3. \u67e5\u8be2\u51fa\u85aa\u8d44\u57281200~1300\u4e4b\u95f4\u7684\u5458\u5de5\u4fe1\u606f\u3002\nSELECT *\nFROM employee\nWHERE salary BETWEEN 1200 AND 1300;\n\n# 4. \u67e5\u8be2\u51fa\u59d3\u201c\u5218\u201d\u7684\u5458\u5de5\u7684\u5de5\u53f7\uff0c\u59d3\u540d\uff0c\u5bb6\u5ead\u4f4f\u5740\u3002\nSELECT id,NAME,addr\nFROM employee\nWHERE NAME LIKE '\u5218%';\n\n# 5. \u5c06\u201c\u674e\u56db\u201d\u7684\u5bb6\u5ead\u4f4f\u5740\u6539\u4e3a\u201c\u5e7f\u4e1c\u97f6\u5173\u201d\nUPDATE employee\nSET addr = '\u5e7f\u4e1c\u97f6\u5173'\nWHERE NAME = '\u674e\u56db';\n\n# 6. \u67e5\u8be2\u51fa\u540d\u5b57\u4e2d\u5e26\u201c\u5c0f\u201d\u7684\u5458\u5de5\nSELECT *\nFROM employee\nWHERE NAME LIKE '%\u5c0f%';<\/code><\/pre>\n\n\n\n<p>\u00a0 \u7ec3\u4e60\u4e8c\u7684\u56fe\u7247<img loading=\"lazy\" decoding=\"async\" height=\"794\" width=\"897\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/0abe98edd4b747b3ac9c1a26aae821a2.png\" alt=\"\"><\/p>\n\n\n\n<p>\u7ec3\u4e60\u4e09\u7684\u56fe\u7247&nbsp;<\/p>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" height=\"310\" width=\"901\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/95b0ea35ab704d35b41ca7d19cde20ad.png\" alt=\"\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp;\u7b2c11\u7ae0_\u6570\u636e\u5904\u7406\u4e4b\u589e\u5220\u6539 \u9996\u5148\u5f97\u5148\u6709\u4e00\u4e2a\u8868\uff1a&nbsp; 1.\u589e\u52a0\u6570\u636e&nbsp; \u4e00\u4e2a\u540c\u65f6\u63d2\u5165\u591a\u884c\u8bb0\u5f55\u7684INSER &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[2],"tags":[16],"class_list":["post-856","post","type-post","status-publish","format-standard","hentry","category-2","tag-sql"],"_links":{"self":[{"href":"https:\/\/eve2333.top\/index.php?rest_route=\/wp\/v2\/posts\/856","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/eve2333.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/eve2333.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/eve2333.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/eve2333.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=856"}],"version-history":[{"count":1,"href":"https:\/\/eve2333.top\/index.php?rest_route=\/wp\/v2\/posts\/856\/revisions"}],"predecessor-version":[{"id":857,"href":"https:\/\/eve2333.top\/index.php?rest_route=\/wp\/v2\/posts\/856\/revisions\/857"}],"wp:attachment":[{"href":"https:\/\/eve2333.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=856"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/eve2333.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=856"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/eve2333.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=856"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}