请指出以下SQL Plus创建飞行员表代码中的错误
Issues in Your Pilots Table Creation SQL
Let's walk through the mistakes in your code clearly:
- Misspelled constraint keyword: You wrote
CONSTRANTinstead ofCONSTRAINT— you're missing an "A" here. Oracle will throw a syntax error right away because it doesn't recognize this misspelled keyword. - Column name typos:
pilots_adressis incorrect; it should bepilots_address(you left out a "d" in "address")pilots_zipeis a typo — this should bepilots_ziporpilots_zipcodebased on what you need to store
- Inconsistent data type for phone number: You used
varchar(50)forpilots_phone, but in Oracle, the standard and recommended data type for variable-length character data isvarchar2. Whilevarcharworks for compatibility, Oracle reserves it for future use, so sticking withvarchar2is the better practice. - Quick design note (not a syntax error): Using
varchar2(50)for your primary keypilots_idis syntactically allowed, but numeric types likeNUMBERare usually preferred for primary keys since they're more efficient for storage and indexing.
Here's the fixed version of your SQL code:
CREATE TABLE pilots ( pilots_id varchar2(50), pilots_name varchar2(50), pilots_address varchar2(50), pilots_city varchar2(50), pilots_state varchar2(50), pilots_zip varchar2(50), pilots_phone varchar2(50), CONSTRAINT pilots_pk PRIMARY KEY (pilots_id) );
内容的提问来源于stack exchange,提问作者Ahmad Maher
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