Can a table have two primary keys Absolutely no, period. The fact that separate unique constraints can be defined does not make them primary keys as well. Similarly, a table could have 999 unique constraints that didn't allow nulls but not have a primary key. ...
5. Primary keys can be contained in a table only ___? Once Twice Thrice None of the above Answer:A) Once Explanation: Primary keys can be contained in a table only once. Comments and Discussions! Load comments ↻ Recently Published MCQs Satellite...
Primary keys can only be found on one table at a time.Learn & Test Your Skills Python MCQsJava MCQsC++ MCQsC MCQsJavaScript MCQsCSS MCQsjQuery MCQsPHP MCQsASP.Net MCQsArtificial Intelligence MCQsData Privacy MCQsData & Information MCQsData Science MCQs Comments and Discussions! Load comments ↻...
to access the uefi settings, you usually need to press a specific key or key combination during the computer's startup process. common keys include del, f2, f10, or esc, but it can vary depending on the computer model. you may need to consult your computer's manual or look for on-...
Once that's done you just have to set the type of export you want: TABLE with constraints, VIEW, MVIEW, TABLESPACE, SEQUENCE, INDEXES, TRIGGER, GRANT, FUNCTION, PROCEDURE, PACKAGE, PARTITION, TYPE, INSERT or COPY, FDW, QUERY, KETTLE, SYNONYM. By default Ora2Pg exports to a file that...
Incorrect table definition; there can be only one auto column and it must be defined as a key,程序员大本营,技术文章内容聚合第一站。
We have a RDS cluster with 2 hosts, since a few days one host has a problem that it can handle 5 users only. Every next user has problems logging in, it...
Can a [non primary key] be referenced as [foriegn key] in other table? Can a uniqueidentifier have a default value? can I access function on remote server through linked server? Can i call a stored procedure in view?. Can I configure FILESTREAM to use file share? Can I delete NT SERV...
(class name is the same as the table name, the Model will Help the camel class name converted to underline the name of the table, attribute the same), @BaseUniqueIndicates the only class attributes (corresponding to A unique attribute in A table, when the primary key used in the table ...
2.4.1 Verifying the MD5 Checksum After you have downloaded a MySQL package, you should make sure that its MD5 checksum matches the one provided on the MySQL download pages. Each package has an individual checksum that you can verify against the package that you downloaded. The correct MD5 ...