SQL UPDATE Statement
Presentation
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Computers
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University
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Hard
Kittisay SENGTHONG
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4 Slides • 0 Questions
1
SQL UPDATE Statement
ຄຳສັ່ງ ແກ້ໄຂ SQL
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The SQL UPDATE Statement
The UPDATE statement is used to modify the existing records in a table.
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UPDATE Syntax
Note: Be careful when updating records in a table! Notice the WHERE clause in the UPDATE statement. The WHERE clause specifies which record(s) that should be updated. If you omit the WHERE clause, all records in the table will be updated!
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UPDATE Multiple Records
It is the WHERE clause that determines how many records will be updated.
The following SQL statement will update the Contactname to "Juan" for all records where country is "Mexico":
SQL UPDATE Statement
ຄຳສັ່ງ ແກ້ໄຂ SQL
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