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A database dump contains a record of the table structure and/or the data from a database and is usually in the form of a list of SQL statements ("SQL dump"). A database dump is most often used for backing up a database so that its contents can be restored in the event of data loss.
A relational database contains multiple tables, each similar to the one in the "flat" database model. One of the strengths of the relational model is that, in principle, any value occurring in two different records (belonging to the same table or to different tables), implies a relationship among those two records.
Columns have unique names within the same table. Each column has a domain (or data type) which defines the allowed values in the column. All rows in a table have the same set of columns. This definition does not preclude columns having sets or relations as values, e.g. nested tables. This is the major difference to first normal form.
Here are the first two letters for each word: FI. SL. MA. BI. GA. LI. BU. LA (SPANGRAM) NYT Strands Spangram Answer Today. Today's spangram answer on Tuesday, January 7, 2025, is LADIES.
Wi ldfires in the greater Los Angele s area continued to burn mostly out of control on Thursday, with at least five blazes engulfing more than 45 square miles.. At least six people have died as a ...
This is also known as a Horizontal Partition, restricting rows output by a query according to specified conditions. With more than one table, the result set will be every combination of rows. So if two tables are T1 and T2, SELECT * FROM T1, T2 will result in every combination of T1 rows with every T2 rows. E.g., if T1 has 3 rows and T2 has 5 ...
Boeing has laid off hundreds of additional employees in Washington state and California as part of planned cuts that will eventually reduce the company's workforce by about 17,000. Nearly 400 ...
An associative (or junction) table maps two or more tables together by referencing the primary keys (PK) of each data table. In effect, it contains a number of foreign keys (FK), each in a many-to-one relationship from the junction table to the individual data tables. The PK of the associative table is typically composed of the FK columns ...