SQL SELECT Statement 2
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Kittisay SENGTHONG
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SQL SELECT Statement 2
ຄຳສັ່ງດຶງຂໍ້ມູນຈາກ
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The SQL SELECT Statement
The SELECT statement is used to select data from a database.
The data returned is stored in a result table, called the result-set.
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SELECT Syntax
Here, column1, column2, ... are the field names of the table you want to select data from. If you want to select all the fields available in the table, use the following syntax: ( * )
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SQL SELECT DISTINCT Statement
The SELECT DISTINCT statement is used to return only distinct (different) values.
Inside a table, a column often contains many duplicate values; and sometimes you only want to list the different (distinct) values.
SQL SELECT Statement 2
ຄຳສັ່ງດຶງຂໍ້ມູນຈາກ
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