目录
- MySQL 教程
-
MySQL SQL
- MySQL SQL
- MySQL SELECT
- MySQL WHERE
- MySQL AND、OR、NOT
- MySQL ORDER BY
- MySQL INSERT INTO
- MySQL NULL 值
- MySQL UPDATE
- MySQL DELETE
- MySQL LIMIT
- MySQL MIN 和 MAX
- MySQL COUNT、AVG、SUM
- MySQL LIKE
- MySQL 通配符
- MySQL IN
- MySQL BETWEEN
- MySQL 别名
- MySQL 连接
- MySQL INNER JOIN
- MySQL LEFT JOIN
- MySQL RIGHT JOIN
- MySQL CROSS JOIN
- MySQL 自连接
- MySQL UNION
- MySQL GROUP BY
- MySQL HAVING
- MySQL EXISTS
- MySQL ANY、ALL
- MySQL INSERT SELECT
- MySQL CASE
- MySQL 空函数
- MySQL 注释
- MySQL 运算符
- MySQL 数据库
-
MySQL 参考
- MySQL 数据类型
-
MySQL 函数
- MySQL 函数
- ASCII
- CHAR_LENGTH
- CHARACTER_LENGTH
- CONCAT
- CONCAT_WS
- FIELD
- FIND_IN_SET
- FORMAT
- INSERT
- INSTR
- LCASE
- LEFT
- LENGTH
- LOCATE
- LOWER
- LPAD
- LTRIM
- MID
- POSITION
- REPEAT
- REPLACE
- REVERSE
- RIGHT
- RPAD
- RTRIM
- SPACE
- STRCMP
- SUBSTR
- SUBSTRING
- SUBSTRING_INDEX
- TRIM
- UCASE
- UPPER
- ABS
- ACOS
- ASIN
- ATAN
- ATAN2
- AVG
- CEIL
- CEILING
- COS
- COT
- COUNT
- DEGREES
- DIV
- EXP
- FLOOR
- GREATEST
- LEAST
- LN
- LOG
- LOG10
- LOG2
- MAX
- MIN
- MOD
- PI
- POW
- POWER
- RADIANS
- RAND
- ROUND
- SIGN
- SIN
- SQRT
- SUM
- TAN
- TRUNCATE
- ADDDATE
- ADDTIME
- CURDATE
- CURRENT_DATE
- CURRENT_TIME
- CURRENT_TIMESTAMP
- CURTIME
- DATE
- DATEDIFF
- DATE_ADD
- DATE_FORMAT
- DATE_SUB
- DAY
- DAYNAME
- DAYOFMONTH
- DAYOFWEEK
- DAYOFYEAR
- EXTRACT
- FROM_DAYS
- HOUR
- LAST_DAY
- LOCALTIME
- LOCALTIMESTAMP
- MAKEDATE
- MAKETIME
- MICROSECOND
- MINUTE
- MONTH
- MONTHNAME
- NOW
- PERIOD_ADD
- PERIOD_DIFF
- QUARTER
- SECOND
- SEC_TO_TIME
- STR_TO_DATE
- SUBDATE
- SUBTIME
- SYSDATE
- TIME
- TIME_FORMAT
- TIME_TO_SEC
- TIMEDIFF
- TIMESTAMP
- TO_DAYS
- WEEK
- WEEKDAY
- WEEKOFYEAR
- YEAR
- YEARWEEK
- BIN
- BINARY
- CASE
- CAST
- COALESCE
- CONNECTION_ID
- CONV
- CONVERT
- CURRENT_USER
- DATABASE
- IF
- IFNULL
- ISNULL
- LAST_INSERT_ID
- NULLIF
- SESSION_USER
- SYSTEM_USER
- USER
- VERSION
- MySQL 示例
MySQL DROP DATABASE 语句
MySQL DROP DATABASE 语句
这个DROP DATABASE语句用于删除现有的 SQL 数据库。
语法
DROP DATABASE
databasename;
笔记：删除数据库之前要小心。删除数据库将导致数据库中存储的完整信息丢失！
删除数据库示例
以下 SQL 语句删除现有数据库 "testDB"：
示例
DROP DATABASE testDB;
提示：在删除任何数据库之前，请确保您具有管理员权限。删除数据库后，您可以使用以下 SQL 命令在数据库列表中检查它：SHOW DATABASES;
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