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- Translation initialization: 2025-06-23T06:48:29.245290
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+ Translation initialization: 2025-06-23T06:48:51.684822
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---
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- title : Comparison Operators
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+ title : 比较运算符
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---
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- | Operator | Description | Example | Result |
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- | ------------- | ------------------------------------------- | ------------------------- | ------ |
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- | ` = ` | a 等于 b | ` 2 = 2 ` | TRUE |
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- | ` != ` | a 不等于 b | ` 2 != 3 ` | TRUE |
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- | ` <\ > ` | a 不等于 b | ` 2 <\ > 2 ` | FALSE |
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- | ` > ` | a 大于 b | ` 2 > 3 ` | FALSE |
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- | ` >= ` | a 大于或等于 b | ` 4 >= NULL ` | NULL |
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- | ` < ` | a 小于 b | ` 2 < 3 ` | TRUE |
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- | ` <= ` | a 小于或等于 b | ` 2 <= 3 ` | TRUE |
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- | ` IS NULL ` | 如果表达式为 NULL 则为 TRUE,否则为 FALSE | ` (4 >= NULL) IS NULL ` | TRUE |
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- | ` IS NOT NULL ` | 如果表达式为 NULL 则为 FALSE,否则为 TRUE | ` (4 >= NULL) IS NOT NULL ` | FALSE |
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+ | 运算符( Operator) | 描述( Description) | 示例( Example) | 结果( Result) |
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+ | ------------------ | ------------------------------------------------- | ------------------------- | -------- ------ |
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+ | ` = ` | a 等于 b | ` 2 = 2 ` | TRUE |
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+ | ` != ` | a 不等于 b | ` 2 != 3 ` | TRUE |
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+ | ` <> ` | a 不等于 b | ` 2 <> 2 ` | FALSE |
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+ | ` > ` | a 大于 b | ` 2 > 3 ` | FALSE |
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+ | ` >= ` | a 大于或等于 b | ` 4 >= NULL ` | NULL |
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+ | ` < ` | a 小于 b | ` 2 < 3 ` | TRUE |
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+ | ` <= ` | a 小于或等于 b | ` 2 <= 3 ` | TRUE |
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+ | ` IS NULL ` | 表达式为 NULL 时返回 TRUE,否则返回 FALSE | ` (4 >= NULL) IS NULL ` | TRUE |
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+ | ` IS NOT NULL ` | 表达式为 NULL 时返回 FALSE,否则返回 TRUE | ` (4 >= NULL) IS NOT NULL ` | FALSE |
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