The DELETE statement can remove one or more records from a table and generally takes this form: DELETE FROM table list This is also known as truncating a table. To delete the data that is currently in a table, you use the DELETE statement, which is commonly referred to as a delete query. #Refresh tables list in tableplus updateIn most cases, you'll want to qualify the UPDATE statement with a WHERE clause to limit the number of records changed. To update all the records in a table, specify the table name, and then use the SET clause to specify the field or fields to be changed. The UPDATE statement can modify one or more records and generally takes this form. To modify the data that is currently in a table, you use the UPDATE statement, which is commonly referred to as an update query. If the tables are defined exactly alike, you can leave out the field lists. INSERT INTO tblCustomers (CustomerID,, ) The following INSERT INTO statement inserts all the values in the CustomerID, Last Name, and First Name fields from the tblOldCustomers table into the corresponding fields in the tblCustomers table. When you are inserting records from another table, each value being inserted must be compatible with the type of field that will be receiving the data. VALUES (1, Kelly, 'Jill', '555-1040', add many records to a table at one time, use the INSERT INTO statement along with a SELECT statement. You can omit the field list, but only if you supply all the values that record can contain. For example, the following statement will insert the values "1", "Kelly", and "Jill" into the CustomerID, Last Name, and First Name fields, respectively. To define the value list, use the VALUES clause. To add one record to a table, you must use the field list to define which fields to put the data in, and then you must supply the data itself in a value list. INSERT INTO statements are commonly referred to as append queries. In both cases, you use the SQL statement INSERT INTO to accomplish the task. The first is to add one record at a time the second is to add many records at a time. There are essentially two methods for adding records to a table. In this article Insert records into a table
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |