If you give someone a program , you will frustrate them for a day; if you teach them how to program, you will frustrate them for a lifetime.IT 這段話的意思是，如果你交給某人一隻程式，你將折磨他一整天;如果你教會某人如何寫程式，你將折磨他一輩子。

部落格全站分類：數位生活

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Jan 01 Mon 2018 01:17
根據多表條件更新表.............. 一條sql語句............. - gaocong

文章出處

CREATE TABLE a(
    NAME INT,
    age int    
)
CREATE TABLE b(
    height INT,
    weight int    
)
INSERT INTO a VALUES (1,2)
INSERT INTO b VALUES (2,3)
SELECT * FROM a;
SELECT * FROM b
SELECT * FROM a
UPDATE ab SET ab.name=ac.height FROM a AS ab ,b AS ac WHERE ab.age=ac.height