February 2014
Beginner
1248 pages
62h 25m
English
Content preview from Java™ How To Program (Early Objects), Tenth Edition
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Section 24.4.4 Merging Data from Multiple Tables: INNER JOIN
• An INNER JOIN (p. 1057) merges rows from two tables by matching values in columns that are common to the tables. The basic form for the INNER JOIN operator is:
SELECT columnName1, columnName2, ...FROM table1INNER JOIN table2 ON table1.columnName = table2.columnName
The ON clause (p. 1057) specifies the columns from each table that are compared to determine which rows are joined. If a SQL statement uses columns with the same name from multiple tables, the column names must be fully qualified (p. 1057) by prefixing them with their table names and a dot (.).
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