PostgreSQL中的数组与Any

建立表：

CREATE TABLE sal_emp (

name            text,

pay_by_quarter  integer[],

schedule        text[][]

);

插入数据：

INSERT INTO sal_emp

  VALUES ('Bill',

  ARRAY[10000, 11000, 9000, 13000],

  ARRAY[['meeting', 'lunch'], ['training', 'presentation']]);

INSERT INTO sal_emp

  VALUES ('Carol',

  ARRAY[20000, 25000, 25000, 25000],

  ARRAY[['breakfast', 'consulting'], ['meeting', 'lunch']]);

INSERT INTO sal_emp

  VALUES ('Frank',

  ARRAY[10000, 10000, 10000, 10000],

  ARRAY[['breakfast', 'training'], ['meeting', 'lunch']]);

查看：

pgsql=# SELECT * FROM sal_emp;

 name  |      pay_by_quarter       |                 schedule

-------+---------------------------+-------------------------------------------

 Bill  | {10000,11000,9000,13000}  | {{meeting,lunch},{training,presentation}}

 Carol | {20000,25000,25000,25000} | {{breakfast,consulting},{meeting,lunch}}

 Frank | {10000,10000,10000,10000} | {{breakfast,training},{meeting,lunch}}

(3 rows)

pgsql=#

用Any来查询：

pgsql=# SELECT * FROM sal_emp WHERE 10000 = ANY (pay_by_quarter);

 name  |      pay_by_quarter       |                 schedule

-------+---------------------------+-------------------------------------------

 Bill  | {10000,11000,9000,13000}  | {{meeting,lunch},{training,presentation}}

 Frank | {10000,10000,10000,10000} | {{breakfast,training},{meeting,lunch}}

(2 rows)

pgsql=#

用ALL来查询：

pgsql=# SELECT * FROM sal_emp WHERE 10000 = ALL (pay_by_quarter);

 name  |      pay_by_quarter       |                schedule

-------+---------------------------+----------------------------------------

 Frank | {10000,10000,10000,10000} | {{breakfast,training},{meeting,lunch}}

(1 row)

pgsql=#

用下标来查询：

pgsql=# SELECT * FROM sal_emp WHERE 9000 = pay_by_quarter[];

 name |      pay_by_quarter      |                 schedule

------+--------------------------+-------------------------------------------

 Bill | {10000,11000,9000,13000} | {{meeting,lunch},{training,presentation}}

(1 row)

pgsql=#

巴特西

PostgreSQL中的数组与Any

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