Table 1 SQL syntax formats
Format | Description |
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[ ] | Items (keywords or arguments) in square brackets [ ] are optional. |
... | Preceding elements can appear repeatedly. |
[ x | y | ... ] | Optional alternative items are grouped in square brackets and separated by vertical bars. One or none is selected. |
{ x | y | ... } | Alternative items are grouped in braces and separated by vertical bars. One is selected. |
[x | y | ... ] [ ... ] | Multiple parameters or no parameter can be selected. If multiple parameters are selected, separate them with spaces. |
[ x | y | ... ] [ ,... ] | Multiple parameters or no parameter can be selected. If multiple parameters are selected, separate them with commas (,). |
{ x | y | ... } [ ... ] | At least one parameter can be selected. If multiple parameters are selected, separate them with spaces. |
{ x | y | ... } [ ,... ] | At least one parameter can be selected. If multiple parameters are selected, separate them with commas (,). |
openGauss 2025-04-30 22:43:40