define a primary key

Tài liệu Define a Primary Key and Other Indexes docx

... each record, such as a Customer ID. This How-To discusses what the best candidates are for primary keys, as well as how to create them and other indexes. You have created a base table and have ... Indexes are used to improve performance when querying data, such as searching on fields and sorting information. The primary key is an index that ensures that you have at least one unique value ... entered data into it. How do you make sure that you have a way of finding specific records? LastName and FirstName fields won't work because you can have duplicates of those. You also want...

Tài liệu Updating a Primary Key Value pdf

Danh mục: Kỹ thuật lập trình

... the UpdateCommand of the DataAdapter needs to locate the row based on the original primary key and update the primary key value with the current value of the primary key in addition to updating ... Primary Key Value Problem You changed a primary key value in a DataTable and updated the change back to the underlying data source, but the value in the data source remained unchanged. You need ... System.Data; using System.Data.SqlClient; private const String TABLENAME = "TBL0408"; private DataTable dt; private SqlDataAdapter da; // . . . private void UpdatePrimaryKeyForm_Load(object...

Tài liệu Issues Involved When Updating the Primary Key of a Parent Row pptx

Danh mục: Kỹ thuật lập trình

... parent table. Updating the Primary Key of a Parent Table and Pushing the Change to the Database In this section you'll learn what happens if you attempt to update the primary key in a ... DataTable. This is the default. None Indicates that no action takes place. SetDefault Indicates that the DataColumn values in the child DataTable are to be set to the value in the DefaultValue ... the parent DataTable on which the ForeignKeyConstraint was created, then the same change is also made in any corresponding DataRow objects in the child DataTable. You should set UpdateRule...

Tài liệu Adding Records with a GUID Primary Key pdf

Danh mục: Kỹ thuật lập trình

... DataTable parentTable = new DataTable(PARENTTABLENAME); cols = parentTable.Columns; col = cols.Add(PARENTID_FIELD, typeof(Guid)); col.DefaultValue = Guid.NewGuid( ); parentTable.PrimaryKey ... the DataSet and create the relationship. ds = new DataSet( ); Table 4-2. DataRowAction enumeration Value Description Add The row has been added to the table. Change The row has been changed. ... be changed after each row is added to the table so that each row has a different GUID primary key value. This is done by handling the RowChanging event for each table. When a row has been added,...

bai tap unit 11- T. A 12 + key

Danh mục: Tiếng anh

... must have taken b. must have been takenc. can't have been taken d. can't have taken29. The garden ________. It has just started raining. a. needn't water b. needn't be wateredc. ... reviewed12. As for me, I consider reading ________ important part of ________ life. a. an / Ø b. the / a c. Ø / the d. an / a 13. Anne says that she reads about half ________ hour a day, at least. a. a ... because a pack of sharks follow the trail to Santiago's boat ________. a. so that the marlin is bitten largely by each of themb. it is taken an enormous bite by each sharkc. and each shark...

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TRẮC NGHIỆM-TRÌNH ĐỘ A-CÓ KEY

Danh mục: Tiếng anh

... byd. Taliban -> b9. You are many more intelligent than I thought you are. a. manyb. thanc. thoughtd. are-> a III. Grammar and Vocabulary10. Public libraries to all readers. a. openb. ... winner of the art competition a prize. a. awardedb. were being awardedc. was awardingd. was being awarded d46. When I arrived, the train had left. a. neverb. yetc. alreadyd. suddenly ... 11:1. a. hearb. dearc. teard. bear > d2. a. deadb. headc. weatherd. seat > d3. a. pleaseb. nosec. losed. house > d4. a. mainb. saintc. saidd. maid > c5. a. barnb....

Designing a Public Key Infrastructure

Danh mục: Quản trị mạng

... mmc and then press ENTER. d. On the Console menu, click Add/Remove Snap-in. e. In the Add/Remove Snap-in dialog box, click Add. f. On the Add Standalone Snap-in dialog box, click Certificates ... click Add, and then click Close. g. Click OK to close the Add/Remove Snap-in dialog box. h. On the Console menu, click Save As. i. In the Save As dialog box, type Certificate Management ... Designing a Public Key Infrastructure Copyright  2002 Microsoft Corporation. All Rights Reserved. Tasks Detailed Steps Why was the Base-64 encoded binary x.509 certificate format selected?...

Define a Class in Visual Basic .NET

Danh mục: Cơ sở dữ liệu

... different ways. An interface cannot exist as an object: It has no code and no place to store object data. A class that implements an interface has an explicit contract with the interface: The class ... You can also create properties that accept a parameter. For example, in the Northwind database, a customer might have many orders. A parameterized property would be a perfect way to access ... 9.1 Define a Class in Visual Basic .NET Before writing code, you should take a moment to decide what data the class needs to contain and what actions a developer (whether it is you or a teammate)...

TUBERCULOSIS PNEUMONIA AS A PRIMARY CAUSE OF RESPIRATORY FAILURE-REPORT OF TWO CASES pdf

Danh mục: Sức khỏe giới tính

... organismper se. These infiltrates can appear within a matterof days and can clinically simulate acute bacterialpneumonia. Anti-tubercular treatment has beenconsidered to be an important factor ... was able to maintain 90% oxygen saturation(SaO2) at room air. Anti-tuberculosis therapy wascontinued and at 12 weeks he was maintainingoxygen saturation (SaO2) of 94% at room air. Hewas ... tuberculousbronchopneumonia, was able to maintain oxygensaturation (SaO2) of 96% at room air, while patientwith tuberculous pneumonia in case 2 was able tomaintain SaO2 of 90% at room air at six weeks.Organ...

The Euro Imbalances and Financial Deregulation: A Post-Keynesian Interpretation of the European Debt Crisis pot

Danh mục: Tài chính doanh nghiệp

... a share of assets of all commercial banks. “Z-Score” is estimated as ROA+equity/assets/sd(ROA); the standard deviation of ROA, sd(ROA), is estimated as a 5-year moving average. Source: Based ... banks, and other financial institutions. “Costs/Income” is measured as total costs, as a share of total income of all commercial banks. “Interest margins” equals the accounting value of a bank's ... (LFS): Database. http://epp.eurostat.ec.europa.eu/portal/page/portal/employment_unemployment_lfs/data/database (accessed December 19, 2011). European Council. 199 2a. The Maastricht Treaty–Provisions...

Philosophy in a New Key A Study in the Symbolism of Reason, Rite, and Art

Danh mục: Tâm lý - Nghệ thuật sống

... mission that we regard it as the only im-portant expressive act, and assume that all other activity mustbe practical in an animalian way, or else irrational—playful,or atavistic (residual) past ... magic"rests on a mistaken view of causality. After all, a savage whobeats a tom-tom to drive off his brother's malaria would nevermake such a practical mistake as to shoot his arrow ... language." 5An interpretation of observed facts that adjusts them to a general scientific outlook, a theory that bridges what used toappear as a saltus naturae, a logical explanation...

Báo cáo khoa học: Insect cytokine, growth-blocking peptide, is a primary regulator of melanin-synthesis enzymes in armyworm larval cuticle pptx

Danh mục: Báo cáo khoa học

... pair(5¢-ATGGAGGCCGGAGATTTCAAAG-3¢, +1 to +22 bp;and 5¢-ACGGGCTTTAAGTATTTCATCAGGC-3¢, +1405to +1428 bp) and actin primer pair (5¢-TTCGAGCAGGAGATGGCCACC-3¢ and 5¢-GAGATCCACATCTGYTGGAAGGT-3¢). ... Yoichi Hayakawa21 Graduate School of Environmental Earth Science, Hokkaido University, Sapporo, Japan2 Department of Applied Biological Science, Saga University, JapanAnimal color patterns have ... ReverTra Ace(TOYOBO). The cDNA was ampliﬁed with TH-speciﬁcprimer pair (5¢-CAGCTGCCCAGAAGAACCGCGAGATG-3¢, +11 to +36; and 5¢-GAACTCCACGGTGAACCAGT-3¢, +1286 to +1305 bp), DDC-speciﬁc primer pair(5¢-ATGGAGGCCGGAGATTTCAAAG-3¢,...