The table name can be specified as db_name.tbl_name to create the table in a specific database. This works regardless of whether there is a default database, assuming that the database exists. If you use quoted identifiers, quote the database and table names separately. For example, write...
Query:createfunctionNameByT()returnchar(50)return(select name from t3 where id=2)Error Code:1064You have an errorinyourSQLsyntax;check the manual that corresponds to your MySQL server versionforthe right syntax to use near 'returnchar(50)return(select name from t3 where id=2)' at line2Exe...
n last_insert_id()函数只能返回当前session最近一次insert操作之后所使用到的auto_increment类型字段的值,且使用"select last_insert_id()",不要再跟一个"from table_name"。 n WHERE条件中严禁在索引列上进行数学运算或函数运算。 n 用in() /union替换or,并注意in的个数小于300。 n 严禁使用%前缀进行模糊前...
The Create table command has the following aspects. It is described under the sections: Table Name Column data type and attributes Primary key and foreign keys Table Name: tblname The table name must be specified as <DBName>.<TableName> to create a table in a specific database. This...
Step 2: Select a Schema After connecting to a database server, select adatabase schema. In the left menu, use the arrows to navigate toSchemas, then expand the schema in which you want to create a table. Alternatively, create a new schema. Follow our instructions tocreate a new database...
| information_schema || mysql || performance_schema || sys |+———–+5 rows in set (0.01 sec)mysql> USE db_test1; #选择需要操作的数据库。Database changedmysql> CREATE TABLE tbl_my_table; #创建数据表 tbl_my_table 。ERROR 4028 (HY000): A table must have at least one visible ...
mysql> create table `app_db`.t2(a int); Query OK, 0 rows affected (0.01 sec) mysql> alter table `app_db`.t2 engine=innodb; Query OK, 0 rows affected (0.02 sec) Records: 0 Duplicates: 0 Warnings: 0 mysql> drop table `app_db`.t2; ...
1mysql>CREATE DATABASE school; 固定用法的大写,可以替换的小写2Query OK,1row affected (0.00sec) 创建一个数据库不加s34mysql>SHOW DATABASES; 查看数据库时时多个加s5+---+6| Database |7+---+8| information_schema |9| mysql |10| performance_schema |11| school |12| sys |13+---+145rowsin...
dbMapping.targetTable orders_canal 写入到表格存储的目标表名称。 dbMapping.targetPk order_id: order_id 主键配置,格式为 pk: target_pk,即 源表主键名称: 目标表主键名称。 说明 多个主键列配置时顺序必须与Tablestore中的主键顺序相同。 Tablestore适配器支持配置主键列自增,格式为 $$: target_pk,表示在目标...
在performance_schema.events_statements_summary_by_digest_supplement表中增加TCP写入等待时长。 允许DDL语句以In Place方式执行时记录redo日志。 disabled_storage_engines参数中默认加入MyISAM,即不再支持创建MyISAM引擎的表。 Bug修复 修复SHOW GLOBAL STATUS的执行结果出现异常的问题。 修复Jemalloc Profiling功能开启导致...