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 _    _     ______    ______     ___     _    _   
| |  | ||  /_   _//  /_____//   / _ \\  | |  | || 
| |/\| ||   -| ||-   `____ `   / //\ \\ | |/\| || 
|  /\  ||   _| ||_   /___//   |  ___  |||  /\  || 
|_// \_||  /_____//  `__ `    |_||  |_|||_// \_|| 
`-`   `-`  `-----`   /_//     `-`   `-` `-`   `-` 
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發送短信 : XML query processing: Indices and histograms