在PostgreSQL中進行復雜查詢和連接表通常使用SQL語句來實現。以下是一些常見的方法：
SELECT *
FROM table1
INNER JOIN table2 ON table1.column_name = table2.column_name;
SELECT *
FROM table1
WHERE column_name IN (SELECT column_name FROM table2);
SELECT column1 FROM table1
UNION
SELECT column2 FROM table2;
WITH temp_table AS (
SELECT *
FROM table1
)
SELECT *
FROM temp_table
INNER JOIN table2 ON temp_table.column_name = table2.column_name;
SELECT *
FROM table1
WHERE EXISTS (
SELECT *
FROM table2
WHERE table1.column_name = table2.column_name
);
這些是一些常見的方法，您可以根據具體情況選擇適合的方式來進行復雜查詢和連接表。
