86 lines
2.9 KiB
Plaintext
86 lines
2.9 KiB
Plaintext
drop table 燹俑骜砧;
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ERROR: Relation '燹俑骜砧' does not exist
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create table 燹俑骜砧 (如淦杀 text, 狞瞥婉螭 varchar, 氢蛇 varchar(16));
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create index 燹俑骜砧index1 on 燹俑骜砧 using btree (如淦杀);
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create index 燹俑骜砧index2 on 燹俑骜砧 using hash (狞瞥婉螭);
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insert into 燹俑骜砧 values ('缳妾淦', '绠绠绎世', '啤A01念');
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insert into 燹俑骜砧 values ('犒葸淦', '芈溷却宇狞瞥', '你B10你');
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insert into 燹俑骜砧 values ('螫悖淦', '印汤洗枪却宇狞瞥', '仨Z01摩');
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vacuum 燹俑骜砧;
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select * from 燹俑骜砧;
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如淦杀 | 狞瞥婉螭 | 氢蛇
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--------+------------------+---------
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缳妾淦 | 绠绠绎世 | 啤A01念
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犒葸淦 | 芈溷却宇狞瞥 | 你B10你
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螫悖淦 | 印汤洗枪却宇狞瞥 | 仨Z01摩
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(3 rows)
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select * from 燹俑骜砧 where 氢蛇 = '仨Z01摩';
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如淦杀 | 狞瞥婉螭 | 氢蛇
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--------+------------------+---------
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螫悖淦 | 印汤洗枪却宇狞瞥 | 仨Z01摩
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(1 row)
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select * from 燹俑骜砧 where 氢蛇 ~* '仨z01摩';
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如淦杀 | 狞瞥婉螭 | 氢蛇
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--------+------------------+---------
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螫悖淦 | 印汤洗枪却宇狞瞥 | 仨Z01摩
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(1 row)
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select * from 燹俑骜砧 where 氢蛇 like '_Z01_';
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如淦杀 | 狞瞥婉螭 | 氢蛇
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--------+------------------+---------
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螫悖淦 | 印汤洗枪却宇狞瞥 | 仨Z01摩
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(1 row)
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select * from 燹俑骜砧 where 氢蛇 like '_Z%';
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如淦杀 | 狞瞥婉螭 | 氢蛇
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--------+------------------+---------
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螫悖淦 | 印汤洗枪却宇狞瞥 | 仨Z01摩
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(1 row)
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select * from 燹俑骜砧 where 狞瞥婉螭 ~ '绠绠绎[凫卮世]';
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如淦杀 | 狞瞥婉螭 | 氢蛇
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--------+----------+---------
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缳妾淦 | 绠绠绎世 | 啤A01念
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(1 row)
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select * from 燹俑骜砧 where 狞瞥婉螭 ~* '绠绠绎[凫卮世]';
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如淦杀 | 狞瞥婉螭 | 氢蛇
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--------+----------+---------
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缳妾淦 | 绠绠绎世 | 啤A01念
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(1 row)
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select *, character_length(如淦杀) from 燹俑骜砧;
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如淦杀 | 狞瞥婉螭 | 氢蛇 | char_length
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--------+------------------+---------+-------------
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缳妾淦 | 绠绠绎世 | 啤A01念 | 3
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犒葸淦 | 芈溷却宇狞瞥 | 你B10你 | 3
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螫悖淦 | 印汤洗枪却宇狞瞥 | 仨Z01摩 | 3
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(3 rows)
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select *, octet_length(如淦杀) from 燹俑骜砧;
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如淦杀 | 狞瞥婉螭 | 氢蛇 | octet_length
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--------+------------------+---------+--------------
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缳妾淦 | 绠绠绎世 | 啤A01念 | 6
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犒葸淦 | 芈溷却宇狞瞥 | 你B10你 | 6
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螫悖淦 | 印汤洗枪却宇狞瞥 | 仨Z01摩 | 6
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(3 rows)
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select *, position('却宇' in 狞瞥婉螭) from 燹俑骜砧;
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如淦杀 | 狞瞥婉螭 | 氢蛇 | strpos
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--------+------------------+---------+--------
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缳妾淦 | 绠绠绎世 | 啤A01念 | 0
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犒葸淦 | 芈溷却宇狞瞥 | 你B10你 | 3
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螫悖淦 | 印汤洗枪却宇狞瞥 | 仨Z01摩 | 5
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(3 rows)
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select *, substring(狞瞥婉螭 from 3 for 6 ) from 燹俑骜砧;
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如淦杀 | 狞瞥婉螭 | 氢蛇 | substr
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--------+------------------+---------+--------------
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缳妾淦 | 绠绠绎世 | 啤A01念 | 绎世
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犒葸淦 | 芈溷却宇狞瞥 | 你B10你 | 却宇狞瞥
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螫悖淦 | 印汤洗枪却宇狞瞥 | 仨Z01摩 | 洗枪却宇狞瞥
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(3 rows)
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