单词 | Primary key |
例句 | 1. Note: The primary key field is numeric by default. 2. Accessor 1 contains all columns except the primary key. 3. The primary key can't be a primitive type. 4. Gets the row specified by the primary key value. 5. RemoveExceptionRemove an EJB object identified by its primary key. 6. You must specify the primary key for a table. 7. Primary key property is invalid; please validate database. 8. There is exactly one primary key and at most one secondary key for the wireless Hosted Hetwork on any computer. 9. We keep only a compound primary key and a secondary index for each row, and answer all queries from a single index. 10. A primary key of a table can be a foreign key in any other table. 11. Customer wants to identify the primary key of the last good record before a corruption in an indexed file. 12. Ensure that the column on which the Primary Key (maybe same as Primary Index in many cases) is to be defined in the driving table/dimension is unique. 13. Modify a primary key if you want to change the column order, index name, clustered option, or fill factor. 14. Only one primary key can be assigned to a data table. 15. The primary key can be specified only for the top root view. 16. However, you still need to configure the primary key of the MEMBERSHIP table to use DB2's Identity value generation facility. 17. Defining the table's primary key ( after creating columns ). 18. This index requires each value in the primary key to be unique. 18. is a sentence dictionary, on which you can find nice sentences for a large number of words. 19. You'll create the ID field as an autoincrement primary key. 20. Relations in databases are designed to be searched by the primary keys. 21. deleteDocument provides the interface to post a remove record request to the service based on the specified input primary key. 22. Right - click the row selector for the column and select Set Primary Key. 23. Rename the first attribute to COMP_CODE, specify that it is the primary key, and ensure its data type is CHAR(5). 24. In the exception handler, insert a row into the error log table, recording the time and date, reason code, primary key, and coordinates. 25. A unique identification number, such as an ID number, can a primary key a table. 26. Another cases when you'd like to use it is when your MySQL server is I/O bound now and you do not want to add random I/O because of randomized primary key. 27. In this scenario, you have a table with a primary key. 28. To round things out, you can also define one-to-one relations, where one primary key must match exactly one secondary key. 29. Rule 2: Guaranteed Access RuleAll data should be accessible without ambiguity. This can be accomplished through a combination of the table name, primary key, and column name. 30. If a row is to be included in the download stream, you need not include a row with the same primary key in the delete list. 31. In other words, all columns that are part of the partitioning key must be present in the primary key or unique index definition. 32. Choose two fields from the database table that comprise the primary key. 33. The network monitoring includes the WAP data status analysis, the WAP PKI (primary key indication) analysis, the resource adjustment, etc. 34. It also permits fast access to data when you use the primary key index in queries. 35. The element defines the primary key of the main table. 36. A primary key is a column a unique value for each row. 36. is a sentence dictionary, on which you can find excellent sentences for a large number of words. 37. A unique index or primary key is required for data record identification in this database. 38. Unique, primary key, referential, check, and functional dependency constraints are supported. 39. The column may not have a PRIMARY KEY or UNIQUE constraint. 40. Although this lookup is done via the primary key index, it does take CPU cycles to do the search, and possibly I/O to read index page(s) into the buffer pool. 41. All data should be accessible without ambiguity. This can be accomplished through a combination of the table name, primary key, and column name. 42. It queries your database, indexes each column in each row of the result, and ties each index entry to the row's primary key. 43. Only one Primary Key , But this key included two fields. 44. When we are able to relate without ambiguity any association end to a foreign key, we can apply the correspondence to specify to which primary key the foreign key refers. 45. A primary key is a special thing in the relational model: It must be unique to each record (row) of a table. 46. Right - click the column you want to set as the primary key. |
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