<\/span><\/h2>\n\n\n\n\u5728\u5efa\u8868\u8bed\u53e5\u91cc\uff0c\u76f4\u63a5\u5728\u5b57\u6bb5\u548c\u8868\u5b9a\u4e49\u540e\u9762\uff0c\u52a0\u4e0acomment \u5173\u952e\u5b57\uff0c\u540e\u9762\u52a0\u4e0a\u5b57\u7b26\u4e32\u5373\u53ef\u3002<\/p>\n\n\n\n
\u6839\u636e\u73b0\u6709\u89c4\u5b9a\uff0ccomment\u7684\u6700\u5927\u957f\u5ea6\u662f2000\u4e2a\u5b57\u7b26\u3002<\/p>\n\n\n\n
gbase> create table testcomment(id int comment '\u7f16\u53f7', name varchar(100) comment '\u59d3\u540d') comment '\u6d4b\u8bd5\u6ce8\u91ca';\nQuery OK, 0 rows affected (Elapsed: 00:00:00.29)\n\ngbase> show create table testcomment;\n+-------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\n| Table | Create Table |\n+-------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\n| testcomment | CREATE TABLE \"testcomment\" (\n \"id\" int(11) DEFAULT NULL COMMENT '\u7f16\u53f7',\n \"name\" varchar(100) DEFAULT NULL COMMENT '\u59d3\u540d'\n) ENGINE=EXPRESS DEFAULT CHARSET=utf8 TABLESPACE='sys_tablespace' COMMENT='\u6d4b\u8bd5\u6ce8\u91ca' |\n+-------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase>\n<\/code><\/pre>\n\n\n\n<\/span>\u66f4\u6539\u8868\u6ce8\u91ca<\/span><\/h2>\n\n\n\n\u7528alter table TABLENAME comment '\u65b0\u7684\u6ce8\u91ca\u5185\u5bb9\u2019\u5bf9\u8868\u7684\u6ce8\u91ca\u8fdb\u884c\u4fee\u6539\u3002<\/p>\n\n\n\n
gbase> alter table testcomment comment '\u6d4b\u8bd5\u8868\u6ce8\u91ca\u4fee\u6539';\nQuery OK, 0 rows affected (Elapsed: 00:00:00.12)\n\ngbase> show create table testcomment;\n+-------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\n| Table | Create Table |\n+-------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\n| testcomment | CREATE TABLE \"testcomment\" (\n \"id\" int(11) DEFAULT NULL COMMENT '\u7f16\u53f7',\n \"name\" varchar(100) DEFAULT NULL COMMENT '\u59d3\u540d'\n) ENGINE=EXPRESS DEFAULT CHARSET=utf8 TABLESPACE='sys_tablespace' COMMENT='\u6d4b\u8bd5\u8868\u6ce8\u91ca\u4fee\u6539' |\n+-------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<\/span>\u66f4\u6539\u5217\u6ce8\u91ca<\/span><\/h2>\n\n\n\n\u7528alter table TABLENAME modify \u5217\u540d\u5b57 \u5217\u5b9a\u4e49 comment\u8fdb\u884c\u4fee\u6539\u3002<\/p>\n\n\n\n
\u6ce8\u610f\u5217\u7684\u539f\u6709\u5b9a\u4e49\u8981\u4fdd\u6301\uff0c\u5305\u62ec\u7c7b\u578b\uff0cNOT NULL\uff0c default\u7b49\u3002<\/p>\n\n\n\n
gbase> alter table testcomment modify id int comment '\u6d4b\u8bd5\u7f16\u53f7\u4fee\u6539';\nQuery OK, 0 rows affected (Elapsed: 00:00:00.14)\nRecords: 0 Duplicates: 0 Warnings: 0\n\ngbase> show create table testcomment;\n+-------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\n| Table | Create Table |\n+-------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\n| testcomment | CREATE TABLE \"testcomment\" (\n \"id\" int(11) DEFAULT NULL COMMENT '\u6d4b\u8bd5\u7f16\u53f7\u4fee\u6539',\n \"name\" varchar(100) DEFAULT NULL COMMENT '\u59d3\u540d'\n) ENGINE=EXPRESS DEFAULT CHARSET=utf8 TABLESPACE='sys_tablespace' COMMENT='\u6d4b\u8bd5\u8868\u6ce8\u91ca\u4fee\u6539' |\n+-------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<\/span> \u6dfb\u52a0\u6ce8\u91ca<\/span><\/h2>\n\n\n\n \u6dfb\u52a0\u6ce8\u91ca\u548c\u4fee\u6539\u5b9a\u65f6\u5b8c\u5168\u4e00\u6837\u7684\u64cd\u4f5c\u3002<\/p>\n\n\n\n
gbase> desc t1;\n+-------+----------+------+-----+---------+-------+\n| Field | Type | Null | Key | Default | Extra |\n+-------+----------+------+-----+---------+-------+\n| id | int(11) | YES | MUL | NULL | |\n| value | int(11) | YES | | NULL | |\n| birth | datetime | YES | | NULL | |\n+-------+----------+------+-----+---------+-------+\n3 rows in set (Elapsed: 00:00:00.01)\n\ngbase> alter table t1 comment '\u6dfb\u52a0\u6570\u503c';\nQuery OK, 0 rows affected (Elapsed: 00:00:00.15)\n\ngbase> show create table t1;\n+-------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\n| Table | Create Table |\n+-------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\n| t1 | CREATE TABLE \"t1\" (\n \"id\" int(11) DEFAULT NULL,\n \"value\" int(11) DEFAULT NULL,\n \"birth\" datetime DEFAULT NULL,\n KEY \"idx_id\" (\"id\") KEY_BLOCK_SIZE=4096 USING HASH GLOBAL\n) ENGINE=EXPRESS DEFAULT CHARSET=utf8 TABLESPACE='sys_tablespace' COMMENT='\u6dfb\u52a0\u6570\u503c' |\n+-------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase> alter table t1 modify id int comment '\u6dfb\u52a0\u6ce8\u91ca';\nQuery OK, 0 rows affected (Elapsed: 00:00:00.16)\nRecords: 0 Duplicates: 0 Warnings: 0\n\ngbase> show create table t1;\n+-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\n| Table | Create Table |\n+-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\n| t1 | CREATE TABLE \"t1\" (\n \"id\" int(11) DEFAULT NULL COMMENT '\u6dfb\u52a0\u6ce8\u91ca',\n \"value\" int(11) DEFAULT NULL,\n \"birth\" datetime DEFAULT NULL,\n KEY \"idx_id\" (\"id\") KEY_BLOCK_SIZE=4096 USING HASH GLOBAL\n) ENGINE=EXPRESS DEFAULT CHARSET=utf8 TABLESPACE='sys_tablespace' COMMENT='\u6dfb\u52a0\u6570\u503c' |\n+-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<\/p>","protected":false},"excerpt":{"rendered":"
\u5357\u5927\u901a\u7528GBase 8a\u6570\u636e\u5e93\u96c6\u7fa4\u652f\u6301\u8868\u7684\u6ce8\u91cacomment \uff0c\u5b57\u6bb5\u7684\u6ce8\u91ca\uff0c\u672c\u6587\u4ecb\u7ecd\u8868\u521b\u5efa\u65f6\u7684\u6ce8\u91ca\u4ee5\u53ca\u8868\u6ce8\u91ca\u548c\u5b57\u6bb5\u6ce8\u91ca\u7684\u88c5\u4fee\u3002<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-1739","post","type-post","status-publish","format-standard","hentry","category-gbase8a"],"_links":{"self":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/1739","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/comments?post=1739"}],"version-history":[{"count":3,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/1739\/revisions"}],"predecessor-version":[{"id":1743,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/1739\/revisions\/1743"}],"wp:attachment":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/media?parent=1739"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/categories?post=1739"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/tags?post=1739"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}