Kuv yuav nkag mus rau hauv SQL li cas?

2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47

SQL INSERT rau hauv Nqe lus

Cov INSERT RAU nqe lus yog siv rau ntxiv cov ntaub ntawv tshiab rau ib database. Cov INSERT RAU nqe lus ntxiv cov ntaub ntawv tshiab rau ib lub rooj. INSERT RAU tuaj yeem muaj qhov tseem ceeb rau qee lossis tag nrho nws cov kab. INSERT RAU tuaj yeem ua ke nrog ib SELECT mus ntxig cov ntaub ntawv.

Tom qab ntawd, ua li cas koj ntxig ib kab hauv SQL?

Txhawm rau ntxig ib kab rau hauv lub rooj, koj yuav tsum qhia peb yam:

1. Ua ntej, lub rooj, uas koj xav tau ntxig ib kab tshiab, hauv INSERT INTO clause.
2. Qhov thib ob, ib daim ntawv teev cov kab sib cais ntawm cov kab hauv lub rooj nyob ib puag ncig los ntawm cov kab lus.
3. Thib peb, ib daim ntawv teev npe sib cais ntawm qhov tseem ceeb nyob ib puag ncig los ntawm cov kab lus hauv VALUES kab lus.

Kuj Paub, yuav ua li cas kuv ntxig qhov tseem ceeb rau hauv ib kem hauv SQL? SQL | INSERT INTO nqe lus

1. Tsuas yog qhov tseem ceeb: Thawj txoj hauv kev tsuas yog qhia tus nqi ntawm cov ntaub ntawv yuav tsum tau muab tso rau yam tsis muaj cov npe kab. INSERT INTO table_name VALUES (value1, value2, value3, …);
2. Kem npe thiab qhov tseem ceeb ob qho tib si: Hauv txoj kev thib ob peb yuav qhia ob kab ntawv uas peb xav sau thiab lawv cov txiaj ntsig zoo raws li qhia hauv qab no:

Tib neeg kuj nug, Kuv yuav ua li cas thiaj li nkag tau cov lus nug hauv SQL?

Muaj ob qho yooj yim syntaxs ntawm cov INSERT INTO nqe lus uas tau qhia hauv qab no. INSERT INTO TABLE_NAME (column1, column2, column3, columnN) VALUES (value1, value2, value3, valueN); Ntawm no, kem 1, column2, column3, columnN yog cov npe ntawm kab hauv lub rooj uas koj xav tau. ntxig cov ntaub ntawv.

Kuv yuav ntxig ib lub rooj mus rau lwm qhov li cas?

INSERT INTO SELECT nqe lus theej cov ntaub ntawv los ntawm ib lub rooj thiab muab tso rau hauv lwm lub rooj

1. INSERT INTO SELECT xav kom cov ntaub ntawv hom nyob rau hauv qhov chaw thiab lub hom phiaj cov rooj sib tw.
2. Cov ntaub ntawv uas twb muaj lawm nyob rau hauv lub hom phiaj lub rooj tsis cuam tshuam.