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A simple way to prevent this is to lock the file whenever a record is being modified by any user, so that no other user can save data. This prevents records from being overwritten incorrectly, but allows only one record to be processed at a time, locking out other users who need to edit records at the same time.
Passwords that do not encrypt but restrict modification and can be circumvented. [2] In Word and PowerPoint the password restricts modification of the entire document. [3] In Excel passwords restrict modification of the workbook, a worksheet within it, or individual elements in the worksheet.
Note that with row headers you need to use a separate row in the wikitext for the row header cell. Here below is what a table looks like if the data cell wikitext is on the same line as the row header wikitext. Note that the data cell text is bolded, and the data cell backgrounds are the same shade of gray as the column and row headers.
Journal sheet from 1880 United States census, showing tabular data with rows of data, each a record corresponding to a single person. The concept of a record can be traced to various types of tables and ledgers used in accounting since remote times.
An RW lock allows concurrent access for read-only operations, whereas write operations require exclusive access. This means that multiple threads can read the data in parallel but an exclusive lock is needed for writing or modifying data. When a writer is writing the data, all other writers and readers will be blocked until the writer is ...
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This is an injective relation: each combination of the values of the headers row (row 0, for lack of a better term) and the headers column (column 0 for lack of a better term) is related to a unique cell in the table: Column 1 and row 1 will only correspond to cell (1,1); Column 1 and row 2 will only correspond to cell (2,1) etc.
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