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Kuv yuav hloov cov kev txwv tshwj xeeb hauv SQL li cas?
Kuv yuav hloov cov kev txwv tshwj xeeb hauv SQL li cas?

Video: Kuv yuav hloov cov kev txwv tshwj xeeb hauv SQL li cas?

Video: Kuv yuav hloov cov kev txwv tshwj xeeb hauv SQL li cas?
Video: txhob hnov qab kuv lub npe - Bee lee [Official MV] 2022-23 2024, Kaum ib hlis
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Txhawm rau hloov qhov kev txwv tshwj xeeb

  1. Hauv Object Explorer, right-click lub rooj uas muaj cov tshwj xeeb txwv thiab xaiv Tsim.
  2. Nyob rau ntawm Table Designer ntawv qhia zaub mov, nyem Indexs/Keys.
  3. Hauv Indexes/Keys dialog box, nyob rau hauv Xaiv Thawj/ Cim Ntsiab lossis Index, xaiv qhov txwv koj xav tau kho .

Ua li no, koj yuav hloov cov kev txwv hauv SQL li cas?

Siv SQL Server Management Studio

  1. Hauv Object Explorer, right-click lub rooj uas muaj cov kev txwv kos thiab xaiv Tsim.
  2. Nyob rau ntawm Table Designer ntawv qhia zaub mov, nyem Kos Cov Kev Txwv.
  3. Nyob rau hauv Cheeb Tsam Constraints dialog box, nyob rau hauv Selected Check Constraint, xaiv qhov txwv koj xav hloov.

Yuav ua li cas koj tshem tawm ib qho kev txwv tshwj xeeb? Txhawm rau rho tawm qhov txwv tshwj xeeb siv Table Designer

  1. Hauv Object Explorer, right-click lub rooj nrog qhov tshwj xeeb txwv, thiab nyem Tsim.
  2. Nyob rau ntawm Table Designer ntawv qhia zaub mov, nyem Indexs/Keys.
  3. Hauv Indexes/Keys dialog box, xaiv tus yuam sij tshwj xeeb hauv Cov Ntawv Xaiv Thawj / Cim Cim thiab Cov Ntawv Qhia.
  4. Nyem Rho tawm.

Tom qab ntawd, lo lus nug yog, Kuv yuav ua li cas thiaj tsim tau ib qho kev txwv tshwj xeeb hauv SQL?

Hauv Object Explorer, right-click lub rooj uas koj xav tau ntxiv a tshwj xeeb txwv , thiab nyem Tsim. Nyob rau ntawm Table Designer ntawv qhia zaub mov, nyem Indexs/Keys. Hauv Indexs/Keys dialog box, nyem Ntxiv . Hauv daim phiaj hauv General, nyem Hom thiab xaiv Cim Qhov tseem ceeb ntawm lub npov drop-down mus rau sab xis ntawm cov cuab yeej.

Yuav ua li cas koj lub npe ib tug tshwj xeeb txwv?

Lub npe convention rau ib tug tshwj xeeb txwv yog:

  1. Qhov tshwj xeeb txwv yuav tsum siv cov syntax “UQ_.
  2. Txhua lub npe tshwj xeeb txwv yuav tsum muaj "UQ_" ua ntej.
  3. Thawj tsab ntawv ntawm TableName thiab ColumnName yuav tsum tau sau npe.

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