DatabaseLink`
DatabaseLink`

SQLDelete

SQLDelete[conn,table]

deletes the data in a table in an SQL connection.

SQLDelete[conn,SQLTable[table]]

deletes the data in a table in an SQL connection.

SQLDelete[conn,table,cond]

deletes data that matches cond.

更多信息和选项

  • To use SQLDelete, you first need to load DatabaseLink using Needs["DatabaseLink`"].
  • Use this function with caution, as you can lose data permanently!
  • Returns an integer specifying the number of rows affected by the query.
  • The following option can be given:
  • "Timeout"$SQLTimeoutthe timeout for the query

范例

基本范例  (1)

If you find that the examples in this section do not work as shown, you may need to install or restore the example database with the DatabaseLink`DatabaseExamples` package, as described in Using the Example Databases.

Open a connection:

Delete all the data in a table:

Delete data matching a condition: