root@localhost : mysqlops 02:39:27> ALTER TABLE mysqlops_set_enum MODIFY Work_Option enum(‘DBA’,‘SA’,‘C++’,‘JavaScript’,‘NA’,‘QA’,‘Java’,‘PHP’,‘other’,’’,‘Python’) NOT NULL DEFAULT ‘DBA’; Query OK, 0 rows affected (0.00 sec) Records: 0 Duplicates: 0 Warn...
option 1. set the column to tinyint unsigned not null, and store the value 1,2,3,4. The values 1,2,3,4 represent the values 'New', 'Maintenance', 'Renovation', 'Not Specified' respectively in another lookup table. When i want to select a list of data, the sql is ...
等等,这样既能够很方便的查询出gender的信息(例如在生成页面的gender select option选项时)而不影响效率,扩展添加表项只需要insert或者update gender表即可,这相对于ALTER TABLE来说是好很多的,而且完全不会影响到程序代码(例如生成页面里的option的代码),达到代码和数据库解耦,只要在更新表项后flush一次cache就好。一般...
+———-+———-+ 1 row in set (1.38 sec) root@localhost : mysqlops 02:06:55> SELECT COUNT(*) FROM mysqlops_set_enum WHERE Work_Option=’PHP’; +———-+ | COUNT(*) | +———-+ | 2000000 | +———-+ 1 row in set (5.11 sec) root@localhost : mysqlops 02:45:40> A...
Data.MySqlClient.Interceptors MySql.Data.MySqlClient.Replication MySql.Data.MySqlClient.X.XDevAPI.Common MySql.Data.Types Mysqlx Mysqlx.Connection Mysqlx.Crud Mysqlx.Cursor Mysqlx.Datatypes Mysqlx.Expect Mysqlx.Expr Mysqlx.Notice Mysqlx.Prepare MySqlX.Protocol Mysqlx.Resultset MySqlX.Serialization ...
option works fine.How to repeat:SET PERSIST_ONLY super_read_only=1; Restart the server.Suggested fix:The problem is that when PERSIST_ONLY flag is used, value is written to the mysqld-auto.cnf file "as is". When server starts, it reads values from mysqld-auto.cnf and for bool/int ...
MySqlMigrationType NameIdentifierCollection NameValuePair NetFrameworkVersion Nonce NotificationLevel OpenAuthenticationAccessPolicies OpenAuthenticationAccessPolicy OpenAuthenticationPolicyClaim OpenAuthenticationProviderType OpenIdConnectClientCredential OpenIdConnectConfig OpenIdConnectLogin OpenIdConnectRegistration OperatingSystem...
MySqlSource MySqlTableDataset NetezzaLinkedService NetezzaPartitionOption NetezzaPartitionSettings NetezzaSource NetezzaTableDataset NotebookParameter NotebookParameterType NotebookReferenceType ODataAadServicePrincipalCredentialType ODataAuthenticationType ODataLinkedService ODataResourceDataset ODataSource OdbcLinkedSer...
测试基于InnoDB存储引擎上,对MySQL数据库枚举类型ENUM的字段进行DDL变更操作,是否需要重新创建表呢?...(三) 枚举类型ENUM字段DDL操作 --- a...增加枚举类型字段定义的默认值属性 root@localhost : mysqlops 02:35:51> ALTER TABLE mysqlops_set_enum MODIFY Work_Option...为枚举类型字段创建索引 root@localhost...
enumSome { OPTIONB = 1;} OPTIONA = 0;[SomeOther]我尝试这样做一个隐式类: Gene 浏览4提问于2022-06-24得票数2 1回答 Mysql空ENUM到postgresqlENUM 、、、 在MySQL中,ENUM数据类型默认允许空字段,这似乎不适用于PostgreSQL。因此,我不能用PostgreSQL从VARCHAR转换到ENUM,因为我的数据库中有很多PgSQL不允许...