@文心快码BaiduComatemysql drop database if exist 文心快码BaiduComate 在MySQL中,如果你想要删除一个数据库,但希望先检查它是否存在,可以使用以下步骤和SQL语句来实现。 检查数据库是否存在: 你可以通过查询information_schema.SCHEMATA表来检查某个数据库是否存在。例如,如果你想检查名为mydatabase的数据库是否存在...
database_name指定待删除的数据库名。 示例 删除数据库test2。 obclient>DROPDATABASEtest2;Query OK,0rowsaffected 删除不存在的数据库notest。 obclient>DROPDATABASEnotest;ERROR1008(HY000): Can't drop database 'notest'; database doesn't exist obclient>DROPDATABASEIFEXISTSnotest;Query OK,0rowsaffect...
static String databaseName="viewtest_db";publicstatic final String tableName="alan_hivecatalog_hivedb_testTable";publicstatic final String hive_create_table_sql="CREATE TABLE "+tableName+" (\n"+" id INT,\n"+" name STRING,\n"+" age INT"+") "+"TBLPROPERTIES (\n"+" 'sink.partition-...
database_name指定待删除的数据库名。 示例 删除数据库test2。 obclient>DROPDATABASEtest2;Query OK,0rowsaffected 删除不存在的数据库notest。 obclient>DROPDATABASEnotest;ERROR1008(HY000): Can't drop database 'notest'; database doesn't exist obclient>DROPDATABASEIFEXISTSnotest;Query OK,0rowsaffect...
mysql> drop database drop_database; ERROR 1008 (HY000): Can't drop database 'drop_database'; database doesn't exist // 发生错误,不能删除'drop_database'数据库,该数据库不存在。 mysql> drop database if exists drop_database; Query OK, 0 rows affected, 1 warning (0.00 sec) ...
TheDROP DATABASE IF EXISTS,DROP TABLE IF EXISTS, andDROP VIEW IF EXISTSstatements are always replicated, even if the database, table, or view to be dropped does not exist on the source. This is to ensure that the object to be dropped no longer exists on either the source or the replic...
database is dropped, privileges granted specifically for thedatabase are not automatically dropped. They must be dropped manually.See [HELP GRANT].IF EXISTS is used to prevent an error from occurring if the databasedoes not exist.URL: https://dev.mysql.com/doc/refman/8.0/en/drop-database...
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. InvalidOperationException(message:Database users is not empty. One or more tables exist.) hive> DROPDATABASEIF EXISTS users CASCADE; 加入CASCADE关键字,可以强制删除一个数据库 ...
ERROR 1008 (HY000): Can't drop database 'drop_database'; database doesn't exist // 发⽣错误，不能删除'drop_database'数据库，该数据库不存在。mysql> drop database if exists drop_database;Query OK, 0 rows affected, 1 warning (0.00 sec)//产⽣⼀个警告说明此数据库不存在 mysql> ...
In MySQL Version 3.22 or later, you can use the keywords IF EXISTS to prevent an error from occurring if the database doesn’t exist. You can also drop databases with mysqladmin. See Section 4.8. CREATE TABLE Syntax CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name [(create_definition,...