create table in database mysql query

Ngày tải lên: 21/01/2014, 11:20

Ngày tải lên: 29/03/2014, 16:20

... could be obtained through mining or just from in- formation retrieval. Data mining is an important tool in making the web more intelligent. That is, data mining may be used to mine the data on ... Publisher Created in the United States of America Visit Springer's eBookstore at: http://ebooks.springerlink.com and the Springer Global Website Online at: http://www.springeronline.com Berlin ... computa- tional origins and information systems engineering aspects have received scant attention. The development within the GRID community of the W3C-inspired OGSA indicates a willingness to move in a direction...

Ngày tải lên: 14/12/2013, 15:15

... and enabling a single linear access of the upper-level index for any query point. In addition, to avoid rollback operations in the lower-level index, we try to maintain each grid cell in a size ... processing costs of such queries. In MobiEyes, we introduce the concept of query bitmap, which is a bitmap containing one bit for each query in a query qroup, each bit can be set to 1 or 0 indicating ... sorted according to the x-dimension since the grid cell is flat. Given a query point shown in the figure, nine objects are broken into two lists, with one containing to and the other containing to...

Ngày tải lên: 14/12/2013, 15:15

... minimize the information loss in moving from clustering to clustering This information loss is given by We can also view the information loss as the increase in the uncertainty. Recall that Since H(A) ... approaches in query processing for moving object trajectories. In VLDB, 2000. S. Prabhakar, Y. Xia, D. V. Kalashnikov, W. G. Aref, and S. E. Hambrusch. Query indexing and velocity constrained indexing: ... well studied topic. In [14], Velocity Constrained Indexing and Query Indexing are proposed for efficient evaluation of this kind of queries at a central location. Several other indexing structures...

Ngày tải lên: 14/12/2013, 15:15

... al. Fig. 3. Varying the number of encrypted attributes in TPC-H Query 1. indicates that attributes in lineitem were encrypted with of them appearing in the query computed the running time for NSM ... is based upon ciphertext, while, in the second, the intermediate index is based upon plaintext and the final index is obtained by encrypting the intermediate index. Based upon characteristics ... from a database continuously starting at the beginning of each page. An offset table is used at the end of the page to locate the beginning of each record. NSM is optimized for transferring data...

Ngày tải lên: 14/12/2013, 15:15

... soon as predicates on container values are given in the query, it is often profitable to start query evaluation by scanning (and perhaps merge-joining) a few containers. Please purchase PDF Split-Merge ... performance in the range of 500 to 800 records and 250 to 300 records respectively, and their querying time increases linearly for block sizes exceeding the optimal ranges. The difference in querying ... not impacting query performance. In principle, we expect that in the future a big share of this data will be expressed in XML, thus making the problem of compression very appealing. Finally, for...

Ngày tải lên: 14/12/2013, 15:15

... relational databases into an XML format or to store the information in an XML object in a relational database, increasing the cost of e-business development. Moreover, specifying the mapping in the ... XQzip: Querying Compressed XML Using Structural Indexing 235 containing some elements in the query under experiment prior to the evaluation of the query. Column (7) records the time taken by XGrind ... The gain of speeding up a single access (e.g. using a suitable index) will of course complement the total run-time improvement by reducing the overall number of accesses. Therefore minimizing the...

Ngày tải lên: 14/12/2013, 15:16

... extending the approximate indexing techniques outlined in [1, 21] for creating a metric index for phonemes. We are working on an inside-the-engine implementation of LexEQUAL on an open-source database ... Surveying Engineering, University of Maine, Orono, ME. Freksa, C., Using Orientation Information for Qualitative Spatial Reasoning, in Theories and Models of Spatio-Temporal Reasoning in Geographic ... LexEQUAL using slow dynamic programming algorithm in an interpreted PL/SQL language environment. 5.3 Phonetic Indexing We now outline a phonetic indexing technique that may be used for accessing the...

Ngày tải lên: 14/12/2013, 15:16

... designing the annotation specifications, considering the specifics of data integrity constraint checking, and ascertaining the impact on particular tools remain challenging (and interesting) tasks. focuses ... watermark. Computing and Handling Cardinal Direction Information 335 Fig. 3. Polygon clipping 3 Computing Cardinal Direction Relations Typically, in Geographical Information Systems and Spatial Databases, ... (i.e., in Fig. 9), in the fourth case, we use the south line of and in the last case, we use the north line of In all cases, we use the edges of that fall in the tile of that we are interested in. ...

Ngày tải lên: 14/12/2013, 15:16

... the code in Listing 6.7 to create the GenerateData routine. After creating the SQL statement, this routine assigns it to the Text property of lblSQLString. Then the string is used in a data ... Figure 6.4). 1. Create a Windows Form. Then place the controls listed in Table 6.3 with the following properties set, as displayed in Figure 6.4. Table 6.3. Control Property Settings for This ... letter or group of letters, you are then specifying that you want values ending with those letters. For instance, if you specify %ing, you get skiing, flying, and so on. End Sub Private Sub...

Ngày tải lên: 14/12/2013, 20:16

... between index nodes from corresponding trees in a priority queue and recursively (top-down) refining the search. In this case, using histograms, one could perform, in addition to the type of pruning ... the minimum bounding constraint, which increases the general overlap. In memory, for instance, RS verifies four times more objects than AC. Point-Enclosing Queries. Because queries like “find ... queries like “find the database objects con- taining a given point” can also occur in practice (for instance, in a publish- subscribe application where subscriptions define interval ranges as attributes, and...

Ngày tải lên: 24/12/2013, 02:18

... heuristic approaches to join minimization (as in [8]) should also be explored. Since join mini- mization requires evaluating a conjunctive query over a canonical query database [8], the techniques in this paper ... following: in testing if is containing another CQAC query, does the homomorphism property hold in the test? Consider the case where we check for the containment of any conjunctive query with semi-interval ... fit in main memory and where cost information is essentiallyirrelevant. (Such databases arise naturally in query containment and join minimization, where the query itself is viewed as a database...

Ngày tải lên: 24/12/2013, 02:18

... a point query used in UDF cost modeling. DB2’s LEarning Optimizer(LEO) offers a comprehensive way of repairing incorrect statistics and cardinality estimates of a query execution plan by using feedback ... process of integrating it into computing systems, some prior approaches have been proposed to map MEMS-based storage into disk-like devices. Using disk terminology, a cylinder is defined as the ... the database. Incorporating those UDFs into ORDBMSs entails query optimizers should consider the UDF execution costs when gener- ating query execution plans. In particular, when UDFs are used in...

Ngày tải lên: 24/12/2013, 02:18

... be computed quickly, in a single pass over the data tuples in in the (arbitrary) order of their arrival. At any point in time, our query- processing algorithms can combine the maintained collection ... and since each iteration is actually a generalized bargaining step, using a nested bargaining within a bargaining will only increase the number of exchanged messages. 4 Experimental Study In order ... original query The problem of finding these plans is identical to the answering queries using materialized views [20] problem. In general, this problem is NP-Complete, since it involves searching...

Ngày tải lên: 24/12/2013, 02:18

... PJoin maintains an almost steady output rate whereas the output rate of XJoin drops. This decrease in XJoin output rate occurs because the XJoin state increases over time thereby leading to an increasing ... of XJoin. We differ in that no previous work incorporates both constraint-exploiting mech- anism and adaptivity into join execution logic itself. Unlike the k-constraint- exploiting algorithm, ... joins nor k-constraint-exploiting algorithms do. 6 Discussion: Extending PJoin Beyond Punctuations The current implementation of PJoin is a binary equi-join without exploiting window specifications...

Ngày tải lên: 24/12/2013, 02:18

... SIGMOD 1997. R. Pieringer et al: Combining Hierarchy Encoding and Pre-Grouping: Intelligent Grouping in Star Join Processing. ICDE 2003. F. Ramsak et al: Integrating the UB-Tree into a Database System ... defined by Definition 7, by finding all dead states in the intersection automaton of and to determine The set of states, as defined by Definition 8, can also be determined, in linear time, using ... 2000. B. Kane, H. Su, and E. A. Rundensteiner. Consistently updating XML documents using incremental constraint check queries. In Proceedings of the Workshop on Web Information and Data Management (WIDM’02),...

Ngày tải lên: 24/12/2013, 02:18

Ngày tải lên: 24/12/2013, 02:18

Ngày tải lên: 24/12/2013, 02:18

Ngày tải lên: 24/12/2013, 02:18