CREATETABLEyour_table_name(-- 创建表idINTPRIMARYKEYAUTO_INCREMENT,-- 自增主键nameVARCHAR(100)NOTNULL,-- 姓名字段ageINT,-- 年龄字段created_atTIMESTAMPDEFAULTNOW()-- 创建时间字段,默认为当前时间); 1. 2. 3. 4. 5. 6. your_table_name是你要创建的表名,替换为你实际需要的名字。 id INT PRIM...
该流程图清晰地展示了使用“CREATE OR REPLACE TABLE”时的步骤:首先检查表是否存在,如果存在则删除旧表,然后创建新表。 状态图 在执行CREATE OR REPLACE TABLE命令时,我们的数据库表状态变化可以用状态图展示: CREATE OR REPLACE TABLE创建成功CREATE OR REPLACE TABLE删除成功创建成功不存在创建中存在删除中 这个状态...
MySQL中create table语句的基本语法是：CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name [(create_definition,...)] [table_options] [select_statement]没有or replace.
mysql> CREATE OR REPLACE ALGORITHM=TEMPTABLE -> VIEW work_view(ID,NAME)-> AS SELECT id,name FROM work;话说，CREATE OR REPLACE语句非常灵活 在视图存在的情况下可对视图进行修改，视图不在的情况下可创建视图 其基本用法和CREATE VIEW 几乎一致 ALTER语句修改视图 mysql> ALTER VIEW work_view2...
百度试题 题目在MySQL中,除了使用CREATE OR REPLACE VIEW语句修改视图外,还可以使用___语句来修改视图 相关知识点: 试题来源: 解析 ALTER;ALTER VIEW 反馈 收藏
While creating a table in MySQL, using CHARACTER SET binary, you can define that the character set for a column will be binary. The following MySQL statement will create a table 'mytale2' using the CHARACTER SET as binary. -- Create a new table named 'mytable2' ...
By default, tables are created in the default database, using the InnoDB storage engine. An error occurs if the table exists, if there is no default database, or if the database does not exist. MySQL has no limit on the number of tables. The underlying file system may have a limit...
CREATE TABLE ... LIKEperforms the same checks asCREATE TABLE. So a statement may fail if a change in theSQL_MODErenders it invalid. For example: CREATEORREPLACETABLEx(dDATEDEFAULT'0000-00-00');SETSQL_MODE='NO_ZERO_DATE';CREATEORREPLACETABLEyLIKEx;ERROR1067(42000):Invaliddefaultvaluefor'd...
To create the view explicitly in a given database, use db_name.view_name syntax to qualify the view name with the database name: CREATE VIEW test.v AS SELECT * FROM t; Unqualified table or view names in the SELECT statement are also interpreted with respect to the default database. ...
IF NOT EXISTS无法与REPLACE共存,这意味着不允许使用CREATE OR REPLACE TABLE IF NOT EXISTS。 table_name 要创建的表的名称。 名称不得包含时态规范或选项规范。 如果未限定该名称,则会在当前架构中创建该表。 hive_metastore中创建的表只能包含字母数字 ASCII 字符和下划线 (INVALID_SCHEMA_OR_RELATION_NAME...